Give me some pointers on the flywheel......I have drilled out the 2 flyweights, but all fins are still in tact.....I have a friend with a lathe that can probably take care of the grinding or whatever, but how would I check the balance of the flywheel??? I am using a wooden 18x10 prop solidly mounted (or WAS solidly mounted until Sunday).....I am also using the original coil ignition system which works great....just a vibe issue at this point.....any ideas will be appreciated....