YZ rollers - My Y-axis wheels travel a bit pigeon toe

Hi, My LR2 has an issue where the two wheels do not run at the same distance from the edge of the table. One runs right along the edge and the other runs in about 3/16" This is the same on both sides. I went back to check where I may have gone wrong and I see there is a YZ roller and YZ roller M. I now from looking at them that they are different but I don’t know how to distinguish which is the _M roller. Also how do I know which is the lower Za versus the lower Zb. Thanks in advance…

It’s subtle, but look here at #5 and you’ll see a bump out on the print where the wheel bearing touches. This is to keep the wheel from rubbing.

Thank you!

Glad to help!