I just received a set of these tonight and immediately tried the 29mm stand-off on the motor mount for an Apogee Kronos. I'm terrible at aligning things by eye, and sure enough when I slipped the stand-off up the motor tube the first ring was about 5 degrees away from square. The glue was still wet so I was easily able to square the ring, gently clamp down the stand-off and now it's drying in place. I expect to be using these a lot.
