Well Ive got a new TT46 Pro and a Tower Muffler that's going on it. I won the TT46 at a Pro-Bro event so Im gonna give it a try. If it doesnt pull the plane to my liking Im gonna go with another Irvine .53 like Ive got on my Sledge. I realy love my Irvine but since I have a free TT46 I gotta give it a try. And I think if the plane turns out as light as Im hoping it will do okay swinging an 11.5x4 APC. We shall see in the spring.