RE: How to balance a carbon fiber prop?
I'd recommend adding epoxy to the back side of the very tip of the appropriate blades. Rough the area with 400-600 grit paper first. Some guys like to spray clear gloss paint, but it takes to long to dry in my oppinion - and it looses weight as it dries.
I like using 5 minute epoxy......and working quickly. It's thick, so doesn't run too badly, and you can easily remove some if you add to much. Just keep spinning the prop and adding to the lightest blade. When you get two light blades, add the same amount to both. You should end up with epoxy on no more than 2 blades when you're done - in other words, remove some before adding to the third blade.