Hey good catch chief-hes 100% correct on that flywheel being almost impossible to get to run true, I did a test between several aqua steel flywheels on my lathe and the only way I could get one to run true was spin and adjust till I got it correct, not 1 time did I chuck one up and have it run worth a spit on the first shot (usually not the second or third either) I even tried other brass cones and mix and match-no difference