When upgrading my Prusa i3 MK2S to the MK2.5, I had the "problem" of not having a proper x-axis carriage for my already installed Igus drylin RJ4JP-01-08 bearings.
I have used the remix source to understand how it worked, and took the original MK2.5 OpenSCAD file from Prusa Github to make it fit on MK2.5.
Finally, I made some tweaks to get the bearings nice and snug; OpenSCAD included.
Prusa PETG or ABS
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