RE: U-CAN-DO 3D .60, What engine?
I have the 60 with a G90 and it has unlimited verticle and all you need for 3D, I have a 15x4 APC and the engine is broken in @ about 2 !/2 gals of 15 %. Mine is on it's side so there are no issues with fuel feed.........
Bet you have flooding issues and the engine is not running really clean? Inverted caused lots of problems.