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Having the bearings out of line causes rail bending. I made a new one, adjustable, not a good Idea. With that design to get the cross rails perpendicular the z rails had to be too loose. That is on my machine with PLA, people using exotics might be the opposite.

I did learn a few things that should make the new one better even if it is just tweaking the current parts.

I’m trying another one with a solid center, but I might have to split them again. Or something similar to the rollers. Such a bummer I dissected a machine last night ready to build the new one today to find this out.

Also wondering about the rollers now because of the offset bearing there.