Not every flywheel is the same weight!
The flywheel i sent to Ken was 3lb 0.8oz the other flywheel i have is 3lb 0.2oz!
The flywheel i sent to ken has 1 hole drilled in it for balancing, and the other flywheel has 4 balancing holes drilled in to it.
I also did not like the lumpy bumpy uneven coating of that stuff that is on the magnets from the factory, and the corner of the flywheel. So i smoothed it out and rounded the corner a little.