I’ve just found an old thread about small angle rotations:
It seems I’m just out of luck.
Still seems like a bug to me. I do understand there need to be tolerance limits, but this seems set just too coarsely. As I said earlier, offering apparent precision to four decimals of degrees, then getting stuck at only slightly better than two (0.057° or thereabouts as a minimum rotation) really is making life very difficult at this point.