I put the 7700 and Mamba ESC into my FTTC4 today and went to the track.
the footprint of the ESC was identical to the Novak GTX and cap that i took out.
I need a bigger spur gear, couldn't move the motor close enough to get the gearing i wanted with a 72t. the can on the Mamba is bigger than most. I also had to file out the chassis on my BJ4 when i had it in there.
I've been using the low power, so I guess i've got retarded timing
got ESC over 200 degrees, no thermaling. motor peaked at about 195.
gotta gear down for sanity if nothing else.