Ari--The G26 I have is one of the B&B engines that comes with their inverted muffler (non-pitts style). I'm going to stick with it as there is not much room behind the engine to use a wraparound muffer.

Cannonball200--Wow, you really want to hand a Brison 2.4 on this guy? I've got a Brison 2.4 on my big Dave Patrick Edge 540T. That thing swings an APC 20x10 at 7850 RPM static. My Edge has unlimited vertical and hangs on the prop at around 1/3 throttle. The Edge weighs in at 15 lbs and is a much more substantial airframe. I'm curious to see how yours would hold up to that big of an engine on such a small airframe.