RE: Muffler baffles
In my opinion, the gain in RPM is not worth the effort for the noise incerase.
This has been debated several times before with those that insist that it is worth it, and those that say it's not.
My take on it is that noise does not necessarily equate to power, just more aggravation for those around you at the field and for the neighbors nearby your flying field. If you live in an area with no houses around for about a mile or two, well, it may not matter. But many clubs have noise limits. Our's does.
CGr.