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Hi spigandromeda, There are two versions currently uploaded. The original file which has a slightly narrower recess for the bearing to sit in and a revised version created at the request of nnm4me which will have a little extra length in that recess and a small change to make the part a little taller to place the bearing slightly further from the surface it's attached to.

I would have thought that the extra space in the revised version is unlikely to cause a problem as the position of the carriage or bed is dependant upon the timing belt which is driving it rather than the individual positions of the bearings.