Now I'm one of those oddballs that prefers MAS props to APC. But I will second the fact that you MUST scrape off the flashing from a MAS prop. Early in my return to flying (Back in the 80's) I installed a new MAS prop, and after tightening, I flipped it a few times (as anyone is likely to do). Next thing I knew, there was blood everywhere! The Trailing Edge of that prop was like a razor blade!

But back to balancing...

lrumd, you do not HAVE to balance a prop. They may not be perfect from the factory, but they really don't need to be. I own a prop balancer only because I received one as a gift 10 years ago. I that 10 years I have balanced maybe 3 props.