Thanks Shane, that’s exactly the clarification I was looking for, even though it still sounds like my machine has issues.
Thanks vicious, I definitely have the correct center parts printed. The only thing I haven’t done yet is remove all the bolts from the middle assembly and re-tighten everything, just because for me that will involve taking the whole machine apart, re-squaring the frame, etc. I guess I’m going to have to do that, though I’m not very optimistic that will fix matters.
I am considering if the problem could be at the rollers. There’s a little bump/print blemish near the top edge (see photo. It’s barely visible in the circled area). It didn’t seem like much, but if it’s at the same location on both sides is it possible that over the span of the whole gantry it could add up to the ~ 1/4″ misalignment I’m seeing?