Quick update: I adjusted infinity focus a few times, but was having problems focusing regardless. Finally realized that the front shroud was keeping the standard from coming all the way in; at some point along the way, the shim washers were lost. Improvised some new ones, checked focus with a ground glass, and buttoned it back up. Loaded a roll of SFX200, which is now drying. Preliminarily, the negatives look sharp. So, I'm optimistic about this Xenar.