I have been flying planes for long time and have flown a helicopter a few times. I bought a Hirobo Shuttle SCEADU 30 FZ-III rotor head one. I heard there was an upgrade kit available where I could run a 50 size engine. I plan to fly this how it is with the OS 32 in it to learn on. later down the road might up grade it to a 50 size. Thoughts?