ORIGINAL: Gray Beard
Perhaps there is something about DENVER you don't quite understand.
E.g. Altitude?
However I somewhat agree with him.
I have Big Stik .60's with both a SuperTigre .75 and a Tower Hobbies .75 two stroke engines.
Both give me unlimited vertical. ( Note however that I'm at about 350' above sea level however )
Given the altitude a slightly larger 2 stroker may be called for ( e.g. a .90?), but a 1.20 seems awfully large for this plane.
Even with my .75's I had to put a big 4800mAh pack in the rear of the fuse to get the plane to balance, and an even bigger engine might be problematic.