I was a little confused when building a PFM mod that the "Probability" field in Star Quality Input objects defaults to 0 while being optional. I feel like it makes more sense to make it default to 1 unless people specifically set it to another value mostly because if you've built all the objects already for having varying star quality inputs, it doesn't make sense that they still wouldn't do anything until you actually set the optional "Probability" field as well. Defaulting to 1, unless a different value is placed, seems to make much more sense to me.
Anyways, just a suggestion since it caused me some confusion, but perhaps you have bigger reasons for this, so no worries if that's the case.