4) Next, I repeated this test in the west. Note I changed the meridian setting in ICP to West. In this position, the scope was not occluded, but only just barely. The spreadsheet thought the angle should be -2.6°, INDI called for 341.8°, and I would estimate that it actually needed to be ~339°. Pictures, and spreadsheet below.

I interpret this to suggest that the the length of the OTA offset needs to be bigger, and the pier offset E-W larger as well.