I’ve been having an issue with my 2x of late, that I was getting a drift in the Y axis. I changed out the wiring harness which tends to fail every couple of months but that didn’t help. Then I noticed that the belt was loose, when I went to tighten it I noticed the problem is that the bearing is slipping out of it’s little holder as shown in the picture. I’ve try to push it back in there but it won’t stay. Any ideas?

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Okay this is apparently called a “gantry bracket”, MBI doesn’t list them for sale on the site but if you contact them directly you can get a replacement. I will update this post when the new part comes in and show the result for future reference should anyone else have this issue.