Starting to design out my build, looking for critique

[Washout]

Hi Chrono

No broken etiquette as far as I know. You're probably doing a great job and nobody has much more to add ;)

A few comments I would have from your last set of design drawings are:
- whilst 4 rails looks like a good idea, you will have a devil of a time aligning them I expect. Maybe 2 rails of a larger size might be better?
- Also consider the CS-Labs kit for the controller - many on here use them, including the venerable JazzCNC (which is always a good sign imho)
- Proximity switches if they are the type in a threaded housing, will give a nice amount of adjustment for the trigger point - you can do the same with micro-switches, but they then need a plate with slots to mount them to to achieve that

Keep going and I expect interest will pick up once you start building