diff --git a/docs/INSTALLATION.md b/docs/INSTALLATION.md
index ffd2c042..102f428c 100644
--- a/docs/INSTALLATION.md
+++ b/docs/INSTALLATION.md
@@ -89,240 +89,32 @@ If you'd like to use them you'll have include them in your use statements:
 
 ### I want to customize my models
 
-Create the models, but keep in mind the models need:
+Create the models, extend the existing models and add the new models to the models array in app/config/inventory.php.
 
-- The shown fillable attribute arrays (needed for dynamically creating & updating relationship records)
-- The shown relationship names (such as `stocks()`)
-- The shown relationship type (such as hasOne, hasMany, belongsTo etc)
+You are free to modify anything (such as table names, model names, namespace etc!).
 
-You are free to modify anything else (such as table names, model names, namespace etc!).
+Example:
 
-Metric:
-
-    class Metric extends Model
-    {
-        protected $table = 'metrics';
-    }
-    
-Location:
-    
-    use Baum\Node;
-    
-    class Location extends Node 
-    {
-        protected $table = 'locations';
-    }
-
-Category:
-
-    use Stevebauman\Inventory\Traits\CategoryTrait;
-    use Baum\Node;
-    
-    class Category extends Node
-    {
-        use CategoryTrait;
-        
-        protected $table = 'categories';
-        
-        protected $scoped = ['belongs_to'];
-        
-        public function inventories()
-        {
-            return $this->hasMany('Inventory', 'category_id');
-        }
-    }
-
-Supplier:
-
-    use Stevebauman\Inventory\Traits\SupplierTrait;
-    
-    class Supplier extends BaseModel
-    {
-        use SupplierTrait;
-    
-        protected $table = 'suppliers';
-        
-        public function items()
-        {
-            return $this->belongsToMany('Inventory', 'inventory_suppliers', 'supplier_id')->withTimestamps();
-        }
-    }
-
-Inventory:
-
-    use Stevebauman\Inventory\Traits\InventoryTrait;
-    use Stevebauman\Inventory\Traits\InventoryVariantTrait;
-    
-    class Inventory extends Model
-    {
-        use InventoryTrait;
-        use InventoryVariantTrait;
-    
-        protected $table = 'inventory';
-        
-        public function category()
-        {
-            return $this->hasOne('Category', 'id', 'category_id');
-        }
-        
-        public function metric()
-        {
-            return $this->hasOne('Metric', 'id', 'metric_id');
-        }
-        
-        public function sku()
-        {
-            return $this->hasOne('InventorySku', 'inventory_id', 'id');
-        }
-        
-        public function stocks()
-        {
-            return $this->hasMany('InventoryStock', 'inventory_id');
-        }
-        
-        public function suppliers()
-        {
-            return $this->belongsToMany('Supplier', 'inventory_suppliers', 'inventory_id')->withTimestamps();
-        }
-    }
-    
-InventorySku:
-
-    use Stevebauman\Inventory\Traits\InventorySkuTrait;
-    
-    class InventorySku extends Model
-    {
-        use InventorySkuTrait;
-    
-        protected $table = 'inventory_skus';
-        
-        protected $fillable = array(
-            'inventory_id',
-            'code',
-        );
-        
-        public function item()
-        {
-            return $this->belongsTo('Inventory', 'inventory_id', 'id');
-        }
-    }
-    
 InventoryStock:
 
-    use Stevebauman\Inventory\Traits\InventoryStockTrait;
-    
-    class InventoryStock extends Model
-    {
-        use InventoryStockTrait;
-    
-        protected $table = 'inventory_stocks';
-        
-        protected $fillable = array(
-            'inventory_id',
-            'location_id',
-            'quantity',
-            'aisle',
-            'row',
-            'bin',
-        );
-    
-        public function item()
-        {
-            return $this->belongsTo('Inventory', 'inventory_id', 'id');
-        }
-
-        public function movements()
-        {
-            return $this->hasMany('InventoryStockMovement', 'stock_id');
-        }
-        
-        public function transactions()
-        {
-            return $this->hasMany('InventoryTransaction', 'stock_id', 'id');
-        }
-        
-        public function location()
-        {
-            return $this->hasOne('Location', 'id', 'location_id');
-        }
-    }
-
-InventoryStockMovement:
-
-    use Stevebauman\Inventory\Traits\InventoryStockMovementTrait;
-    
-    class InventoryStockMovement extends Model
-    {
-        use InventoryStockMovementTrait;
-        
-        protected $table = 'inventory_stock_movements';
-        
-        protected $fillable = array(
-            'stock_id',
-            'user_id',
-            'before',
-            'after',
-            'cost',
-            'reason',
-        );
-        
-        public function stock()
-        {
-            return $this->belongsTo('InventoryStock', 'stock_id', 'id');
-        }
-    }
-    
-InventoryTransaction:
-    
-    use Stevebauman\Inventory\Traits\InventoryTransactionTrait;
-    use Stevebauman\Inventory\Interfaces\StateableInterface;
-    
-    class InventoryTransaction extends BaseModel implements StateableInterface
-    {
-        use InventoryTransactionTrait;
-    
-        protected $table = 'inventory_transactions';
-    
-        protected $fillable = array(
-            'user_id',
-            'stock_id',
-            'name',
-            'state',
-            'quantity',
-        );
-    
-        public function stock()
-        {
-            return $this->belongsTo('InventoryStock', 'stock_id', 'id');
-        }
-
-        public function histories()
-        {
-            return $this->hasMany('InventoryTransactionHistory', 'transaction_id', 'id');
-        }
-    }
-    
-InventoryTransactionHistory:
-
-    use Stevebauman\Inventory\Traits\InventoryTransactionHistoryTrait;
-    
-    class InventoryTransactionHistory extends BaseModel
-    {
-        use InventoryTransactionHistoryTrait;
-        
-        protected $table = 'inventory_transaction_histories';
-    
-        protected $fillable = array(
-            'user_id',
-            'transaction_id',
-            'state_before',
-            'state_after',
-            'quantity_before',
-            'quantity_after',
-        );
-    
-        public function transaction()
-        {
-            return $this->belongsTo('InventoryTransaction', 'transaction_id', 'id');
-        }
-    }
+Create your model:
+```
+<?php
+namespace App\InventoryStock;
+
+class InventoryStock extends \Stevebauman\Inventory\Models\InventoryStock
+{
+    // ...
+}
+```
+
+and then modify the models array in app/config/inventory.php to use your new class:
+```
+...
+'models' => [
+        ...
+        'inventory_stock' => 'App\InventoryStock',
+        ...
+    ],
+...
+```
diff --git a/src/Models/Category.php b/src/Models/Category.php
index 69a2db7c..b3d91b7f 100644
--- a/src/Models/Category.php
+++ b/src/Models/Category.php
@@ -30,6 +30,6 @@ class Category extends Node
      */
     public function inventories()
     {
-        return $this->hasMany('Stevebauman\Inventory\Models\Inventory', 'category_id', 'id');
+        return $this->hasMany(config('inventory.models.inventory'), 'category_id', 'id');
     }
 }
diff --git a/src/Models/Inventory.php b/src/Models/Inventory.php
index ff215832..f0c675c7 100644
--- a/src/Models/Inventory.php
+++ b/src/Models/Inventory.php
@@ -26,7 +26,7 @@ class Inventory extends BaseModel
      */
     public function category()
     {
-        return $this->hasOne('Stevebauman\Inventory\Models\Category', 'id', 'category_id');
+        return $this->hasOne(config('inventory.models.category'), 'id', 'category_id');
     }
 
     /**
@@ -36,7 +36,7 @@ public function category()
      */
     public function metric()
     {
-        return $this->hasOne('Stevebauman\Inventory\Models\Metric', 'id', 'metric_id');
+        return $this->hasOne(config('inventory.models.metric'), 'id', 'metric_id');
     }
 
     /**
@@ -46,7 +46,7 @@ public function metric()
      */
     public function sku()
     {
-        return $this->hasOne('Stevebauman\Inventory\Models\InventorySku', 'inventory_id', 'id');
+        return $this->hasOne(config('inventory.models.inventory_sku'), 'inventory_id', 'id');
     }
 
     /**
@@ -56,7 +56,7 @@ public function sku()
      */
     public function stocks()
     {
-        return $this->hasMany('Stevebauman\Inventory\Models\InventoryStock', 'inventory_id', 'id');
+        return $this->hasMany(config('inventory.models.inventory_stock'), 'inventory_id', 'id');
     }
 
     /**
@@ -66,7 +66,7 @@ public function stocks()
      */
     public function suppliers()
     {
-        return $this->belongsToMany('Stevebauman\Inventory\Models\Supplier', 'inventory_suppliers', 'inventory_id')->withTimestamps();
+        return $this->belongsToMany(config('inventory.models.supplier'), 'inventory_suppliers', 'inventory_id')->withTimestamps();
     }
 
     /**
diff --git a/src/Models/InventorySku.php b/src/Models/InventorySku.php
index 718731bb..f85451ab 100644
--- a/src/Models/InventorySku.php
+++ b/src/Models/InventorySku.php
@@ -22,6 +22,6 @@ class InventorySku extends BaseModel
      */
     public function item()
     {
-        return $this->belongsTo('Stevebauman\Inventory\Models\Inventory', 'inventory_id', 'id');
+        return $this->belongsTo(config('inventory.models.inventory'), 'inventory_id', 'id');
     }
 }
diff --git a/src/Models/InventoryStock.php b/src/Models/InventoryStock.php
index 18cefa38..ece59ca4 100644
--- a/src/Models/InventoryStock.php
+++ b/src/Models/InventoryStock.php
@@ -22,7 +22,7 @@ class InventoryStock extends BaseModel
      */
     public function item()
     {
-        return $this->belongsTo('Stevebauman\Inventory\Models\Inventory', 'inventory_id', 'id');
+        return $this->belongsTo(config('inventory.models.inventory'), 'inventory_id', 'id');
     }
 
     /**
@@ -32,7 +32,7 @@ public function item()
      */
     public function movements()
     {
-        return $this->hasMany('Stevebauman\Inventory\Models\InventoryStockMovement', 'stock_id', 'id');
+        return $this->hasMany(config('inventory.models.inventory_stock_movement'), 'stock_id', 'id');
     }
 
     /**
@@ -42,7 +42,7 @@ public function movements()
      */
     public function transactions()
     {
-        return $this->hasMany('Stevebauman\Inventory\Models\InventoryTransaction', 'stock_id', 'id');
+        return $this->hasMany(config('inventory.models.inventory_transaction'), 'stock_id', 'id');
     }
 
     /**
@@ -52,6 +52,6 @@ public function transactions()
      */
     public function location()
     {
-        return $this->hasOne('Stevebauman\Inventory\Models\Location', 'id', 'location_id');
+        return $this->hasOne(config('inventory.models.location'), 'id', 'location_id');
     }
 }
diff --git a/src/Models/InventoryStockMovement.php b/src/Models/InventoryStockMovement.php
index cd59833d..de29e858 100644
--- a/src/Models/InventoryStockMovement.php
+++ b/src/Models/InventoryStockMovement.php
@@ -22,6 +22,6 @@ class InventoryStockMovement extends BaseModel
      */
     public function stock()
     {
-        return $this->belongsTo('Stevebauman\Inventory\Models\InventoryStock', 'stock_id', 'id');
+        return $this->belongsTo(config('inventory.models.inventory_stock'), 'stock_id', 'id');
     }
 }
diff --git a/src/Models/InventoryTransaction.php b/src/Models/InventoryTransaction.php
index 89bb11a1..425e4bf2 100644
--- a/src/Models/InventoryTransaction.php
+++ b/src/Models/InventoryTransaction.php
@@ -23,7 +23,7 @@ class InventoryTransaction extends BaseModel implements StateableInterface
      */
     public function stock()
     {
-        return $this->belongsTo('Stevebauman\Inventory\Models\InventoryStock', 'stock_id', 'id');
+        return $this->belongsTo(config('inventory.models.inventory_stock'), 'stock_id', 'id');
     }
 
     /**
@@ -33,6 +33,6 @@ public function stock()
      */
     public function histories()
     {
-        return $this->hasMany('Stevebauman\Inventory\Models\InventoryTransactionHistory', 'transaction_id', 'id');
+        return $this->hasMany(config('inventory.models.inventory_transaction_history'), 'transaction_id', 'id');
     }
 }
diff --git a/src/Models/InventoryTransactionHistory.php b/src/Models/InventoryTransactionHistory.php
index 1b390da8..bad19c60 100644
--- a/src/Models/InventoryTransactionHistory.php
+++ b/src/Models/InventoryTransactionHistory.php
@@ -22,6 +22,6 @@ class InventoryTransactionHistory extends BaseModel
      */
     public function transaction()
     {
-        return $this->belongsTo('Stevebauman\Inventory\Models\InventoryTransaction', 'transaction_id', 'id');
+        return $this->belongsTo(config('inventory.models.inventory_transaction'), 'transaction_id', 'id');
     }
 }
diff --git a/src/Models/Location.php b/src/Models/Location.php
index 7f6659ad..c6fe3428 100644
--- a/src/Models/Location.php
+++ b/src/Models/Location.php
@@ -27,6 +27,6 @@ class Location extends Node
      */
     public function stocks()
     {
-        return $this->hasMany('Stevebauman\Inventory\Models\InventoryStock', 'location_id', 'id');
+        return $this->hasMany(config('inventory.models.inventory_stock'), 'location_id', 'id');
     }
 }
diff --git a/src/Models/Metric.php b/src/Models/Metric.php
index bd3a71dc..c58f9abb 100644
--- a/src/Models/Metric.php
+++ b/src/Models/Metric.php
@@ -18,6 +18,6 @@ class Metric extends BaseModel
      */
     public function items()
     {
-        return $this->hasMany('Stevebauman\Inventory\Models\Inventory', 'metric_id', 'id');
+        return $this->hasMany(config('inventory.models.inventory'), 'metric_id', 'id');
     }
 }
diff --git a/src/Models/Supplier.php b/src/Models/Supplier.php
index b8495b23..8c34585e 100644
--- a/src/Models/Supplier.php
+++ b/src/Models/Supplier.php
@@ -22,6 +22,6 @@ class Supplier extends BaseModel
      */
     public function items()
     {
-        return $this->belongsToMany('Stevebauman\Inventory\Models\Inventory', 'inventory_suppliers', 'supplier_id')->withTimestamps();
+        return $this->belongsToMany(config('inventory.models.inventory'), 'inventory_suppliers', 'supplier_id')->withTimestamps();
     }
 }
diff --git a/src/config/config.php b/src/config/config.php
index 219d15c1..f8d311d8 100644
--- a/src/config/config.php
+++ b/src/config/config.php
@@ -64,4 +64,31 @@
      */
     'sku_separator' => '',
 
+    /*
+     * The model classes to use if you chose to override them.
+     *
+     * For example, if you create your own Inventory class that extends
+     * Stevebauman\Inventory\Models\Inventory , then you can add:
+     * 'models' => [
+     *   'inventory' => 'App\Inventory'
+     * ]
+     *
+     * All keys are the classnames in snake_case. Any entries that are missing
+     * will use the default Stevebauman classes. BaseModel cannot be extended in this way.
+     *
+     * @var array
+     */
+    'models' => [
+        'category' => 'Stevebauman\Inventory\Models\Category',
+        'inventory' => 'Stevebauman\Inventory\Models\Inventory',
+        'inventory_sku' => 'Stevebauman\Inventory\Models\InventorySku',
+        'inventory_stock' => 'Stevebauman\Inventory\Models\InventoryStock',
+        'inventory_stock_movement' => 'Stevebauman\Inventory\Models\InventoryStockMovement',
+        'inventory_transaction' => 'Stevebauman\Inventory\Models\InventoryTransaction',
+        'inventory_transaction_history' => 'Stevebauman\Inventory\Models\InventoryTransactionHistory',
+        'location' => 'Stevebauman\Inventory\Models\Location',
+        'metric' => 'Stevebauman\Inventory\Models\Metric',
+        'supplier' => 'Stevebauman\Inventory\Models\Supplier',
+    ],
+
 ];