mgn12h carriage with optical endstop probe 0.1

I did this one in tinkercad... The previous one was sketchup which put holes and crap all through the stl.. :(

I'm using these now.. but not with optical endstops yet (can't seem to get them to work with smoothie properly) ... the design really needs nut guides. I'd suggest you avoided this design until I get the nut guides issue sorted out.