Ok, I know someone is going to say this is retarded but it works. I overspeeded my WC 61 in an Ergo 60. Crash wouldn't you know. So it burned out the clutch lining before I could get it stoppd. When I relined the clutch....I could not get the clutch fit correct. I suspected it distorted the clutch maybe a few thousanths. Sure enough. So I held it in my hand and just squeezed the clutch thinking I got nothing to loose. Guess what? That was about 18 gals of fuel ago. It just opened up slightly and I put it back. You might try the same thing. No out of balance...runs smooth and I saved about $45. Might not be the answer for you but it sure worked good for me.