RE: got a new plane
I have this plane with an OS AX 55 and mini tunned pipe. I had to tilt the engine to the left to make clearance for the muffler. It might be in your speed range. 100 to 110Mph I'm guessing with that engine/muffler. I recommend you reinforce the nose wheel wood block. Mine came off after running it on a rough field. Real pain to fix after the fact.
Also I upgraded all my rods to 440 dia. as I knew I didn't want flutter in steep dives at high speed.
I like this plane because it was cheap and it does these huge high speed loops. It will do knife edge as well. Vertical is unlimited.
Enjoy