There's only one company making a 7700 kv sensorless motor out there now, I have on good authority that despite the super high kv, they still make 87% effeciency! The company was initially going to try and adapt or use Feigao stuff, but ditched that idea because they just couldn't be as effecient as the ones they would wind up making.

Oh yeah, I've seen the 7700 motor run in a B4 recently on 3s lipo, flat out ballistic power that would make even the most hardcore nitro guys do a double take. They're stinking durable too, many HARD hits to the motor and motor guard didn't even phase it, truly amazing craftsmanship.

Hey Travis, you think Castle would still be willing to bring more beta testers on board? I got a T2 that'd be fun to get going with BL again.