I don't think there is a brand of plastic prop that is better than the other
when it comes to balancing. I have seen a couple wood Zingers that were
perfectly balanced from the factory, but I don't recall ever seeing a plastic
one that was.

The Master Airscrews are the easiest to balance because you can shave
the edges of the blades by scraping them with an Exacto knife on the heavy
side until the prop balances. I have one MAS prop that was heavy on one
side of the hub, and could not be balanced by conventional means.

I had a couple APC props that could not be balanced because the were
impropely drilled (off center) and were tossed. APC's cannot be scraped
and shaved like the harder plastic MAS props, and are harder to balance.
The APC's are made from some kind of rubber/plastic, and resist sanding
and common balancing techniques, that is one of the reasons I don't like
the APC's because of the balance problems.

On the wood props....I sand the backside of the "light" blade, and apply
a thin amount of epoxy...right on the balancer. Then I quickly add or remove
some epoxy till the prop balances, the set the prop aside and let it harden.

I haven't seen any "new" problems with MAS props. I've been using them
since they first came out.

If you look at my gallery you will see wood and black plastic props. I gave
away all my ugly grey plastic ones.

FBD.