Complete design process written up on https://swicano.github.io/T_breakout_pt1/
Current state of the project
A breakout board for the Adafruit Feather form factor which breaks out the SPI bus into 10 channels each with a unique C/S pin, for the purpose of attaching multiple adafruit MAX31856 breakout to a single feather.
This includes a PCB design for the breakout board itself on Upverter, imported into this repository
PCB design
a 3d print file for a holder to mount the populated breakout, made in Fusion 360 and imported to this repository
3d printed holder
as well as a very basic program to gather data from one data pin, which can be easily extended, in this repository.