Luke
Don't bother with the Purple Pipe on the Capiche. Thats not to say they're rubbish cos they're not. I've got one on my 46FX Wot 4 and it transformed it from good to ballistic! On a 3d model tho I'd go for a throttle pipe, as you want more flexibility on the throttle. When my 46FX jumps on the pipe (so to speak) it quite a power increase, but limited to full throttle.
Philly
That 591 thing made me laugh! I've got one on my Cougar and thankfully it not too bad at 6v. However at 4.8 I have to book an appointment for next week to get the rudder to move

I'm going 3010 all round in my capiche!
Andy