I designed a cover designed as an addon to the AR4 Robot to protect J1 limit switch. especially against main cables when J1 is fully moved.
3D print, PLA or PTEG, better use around 50%infill otherwise the screw head will crush the cover.
To install, drill 3mm holes, remove the M3x14 Philips pan head screws from the J1 limit switch and reinstall the cover on top of the switch using two M3x20 Philips pan head screws. Et voila.
STL file attached (as the .STL or .ZIP file does not upload, download J1 SW Cover STL.docx, rename it as .ZIP extract and you should get the STL file. Il not, contact me. I will also publish it on printables.
Regards