I maidened my Harmon Rocket this morning. I was careful to place CG about 5/8 inch ahead of the range recommended in the instructions, since 3 servos are mounted on the tail, and due to posts I read on these threads regarding balancing the plane.
I motored it with an Evo .46/Bisson Pitts muffler and 11x6 APC prop. Plenty of oompf, good handling with low rates despite 10-20mph wind and gusts that occasionally hit 25-30 at altitude with turbulence from a tree line upwind of field.
Tomorrow, larger diameter wheels, 12x6 prop and hopefully, less wind.
By the way, this was my first ARF. My two previous planes have all been RTF trainers.