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It does not make sense. the large xy pieces are an interference fit and should flex open to fit the conduit without a bolt in it, and the 5″ bolt should do nothing to change the conduit angle. I have to assume your conduit is the wrong size.
Of the pieces that didn’t fit smoothly here it was from print blobs on the inner surface. I chased the holes with a 516 drill bit and everything is smooth now. I will do this before I ship any more parts from now on.