The only other thought I have is as follows....I did some measuring and figured out that if I raised the horizontal center line of the motor 3-3 1/2 inches vertical I could clear the maximum 11x7 prop that they reccomend for the park 480...in other words I would build the firewall up in the rear 3-3 1/2 inches above horizontal thrust line, thus giving me the clearance for the prop to swing above the rear tail booms. Is this an idiotic idea? I understand what happens if you move your horizontal thrust line left or right of center of fuse....but what adverse effects can you get by raising the thrust line all together assuming that incidences and all stay as close to possible as original? On a pusher, I can't see it making too much of a differance...however, I don't know everything, just ask my wife Learn me something if you can!

Thanks again!
Craig