About this 3D model
This is the cleanest way I have found to mount limit switches for the new auto squaring firmware. https://www.v1engineering.com/ Details here, https://www.v1engineering.com/auto-square-dual-endstops/ You will need 4 stop blocks and roller plates, 2 of each. Of course get the right size plate for your build. C=23.5mm J=25.4mm F=25mm