I'm new to the conversion thing, but was under the impression that if a flywheel was faced off on a lathe, it would stay in balance. I purchased a new converted homey 33. Flywheel had been faced, not sawed and sanded. Engine had a bad vibration at all speeds (prop is well balanced), so I removed the flywheel and checked it on a dubro prop balancer. It was severly out of balance. After correcting this, the engine runs much smoother.
Just thought I'd throw that out there. Some others may want to check their's as well.