“They fit nicely on my 7mm mandrel. No vibration. The issue I have is that the instructions say to turn the blanks down to 13.6 and 12.3 mm respectively. The bushings, according to my digital vernier, are 13.6 mm and 12.2 mm so that it is difficult to get the right thickness without hitting the bushes. It would help if maybe they were .5 mm or so smaller in diameter.
Mark”