Same combo I run but I just switched from a APC 12.25 x 3.75 prop to a 11.5 x 4 prop and I think it spins up quicker. The engine is awesome and everybit as powerful as the OS 46Fx. I'm using the Macs sportpipe which also works fine and is lighter than the stock muffler. The OMP Edge is still THE best Edge 540 profile out there and a great bargain for the price. You can build it, cover it, and outfit this plane for under $100 dollars.

Mike