I run the Rventon R on my T4.1 FT and it is flawless. I tun RS Pros on my 4.2 and DEX410 and they heat up whereas the Reventon R runs cool all day long and has plenty of punch and is really smooth on power and I like the braking too.
I run the V3 7.5 on my 4.2 with the RS Pro and is flat out smokes! Not int he bad way. LOL
I pride myself on my soldering skills as I do the cleanest jobs but the the bullet connectors on the end bell of SP Motors make for the cleanest install of any motor. The only thing I think would make it better is if they would relocate them so they all reside on the same edge. They also have 2 or 3 different timing sensor units for more power as needed. Should be a Green a Blue and a Yellow if I remember.