I think that will be the solution, I'll grab a pitts muffler for it. I had hoped I was done spending money on this plane, but that sounds like a good investment. Since you mentioned other kyosho warbirds, let me ask you this. It doesn't mention putting epoxy/tape on the wing seam. Is it safe to presume the joint is strong enough without it? Also, how do the wing hold down bolts not vibrate loose? It looks to me like a metal bolt into a metal blind nut. The kyosho instructions are so poor, I am trying to sort it out as I go.

Thanks.