I am using a g-62 with a bennet muffler swinging a 22 X 10 @ almost 7000 will get there and then some as she runs. The motor claims to weigh four and a half pounds in the manual.. CG is set at 5 1/2 or 140 cm I am wieghing right at 21.1 or 21. 1 blinking 2 occassionally. 6 1/4 oz placed 2 inches foward of hatch in the motor box which gives a very slight nose heavy balenance.

Tom