How do the wrap around mufflers that TLparker suggested work. After looking over the model I am not sure there is much if any room for a canister setup. The problem is i would have to move the fuel tank back to make room for the canister but there is really no room for the fuel tank to move back the way the airplane is biult. I also might be looking at a 3bladed setup?

Thanks everyone

Edit: I did some research on a canister muffler in the plane the DL is in. (GP 27% cap 232) As far as I know it can't be done. There simply isn't the space.