RE: RCV engine
I have the rcv 120 and absolutely love it... get more compliments than you can imagine. I have it in a Hellcat, GSP. Currently running a very scale "Solo Prop" 3 blade 18x14 (solo props are adjustable pitch making it easier to find the right scale prop)
No deadsticks, easiest to tune, sounds great, looks great.
no complaints... break-ins take a while