Some progress made designing the Y linear rail covers.
I plan on laser cutting, folding and gluing the first prototype of these, but I also did reach out to a couple of chinese CMs and got quoted about $250 for a single set. Really not too bad. The price could come down if some people wanted to do a group buy. I see no reason why these couldn’t be made compatible with the stock MR-1 as well.
Still need to design the endcaps, attachment points, and the surfaces they will slide on. Will probably 3D print those from PET to start.
The X axis is giving me a little more trouble. The top rail and screw are better protected by default already sitting on the back of the gantry beam. The bottom rail could be protected by a roll-spring type cover or an air curtain … although TBD if it actually gets pelted with chips.