For the Y-axis guide rails I used a 20x40 aluminum extrusion that I bolted to the base of the unit which I had to drill alternating holes in. I then attached a set of 800mm HGR20 rails with HGH20CA bearing blocks on top of the extrusion and used a custom spacer block and some shims to get them all at the perfect height at all 4 corners of the bed. I was thinking of releasing some more detailed plans on the matter but for most people I think 3Dnate’s designs or brvdboss’s remix on Thingiverse with the smaller SBR16 rails are perfect as the HGR20’s are super overkill. Here are some pictures of my build that might help. You can also go check out the “Minimize Rocking” discussion for some more ideas because a lot has been shared on there by other people doing the same thing.
And here Is some final shots of it assembled in the enclosure
