Stan,

I know how to balance a prop, in fact,the prop had already been balanced. The problem is that the old style saito mufflers are crap.
The pressure nipples are put where there is nothing for the threads to bite to. In fact, Saito is aware that there are flaws in that particular muffler, so thay have come out with a new/updated one that is made of cast material. I eventualy fixed the problem by applying teflon tape and high temp. loctite to the nipple threads. I also applied a small amount of JB Weld around the outside of the nipple where it meets the muffler. It hasn't come out since.
Thanks for the help anyway, and, you need to get your old ass back out to the field and fly with us. I'm sure you're aware we've got the Big Bird event coming up. We've got our back runway coming right along too, in fact , lots of guys are using it only. Try not to be a stranger.

John