The 4.5 burhsless is a HUGE amount of power. It will blitz your 6 turn brushed. I haven't run the Novak, but they make fair gear. I doubt the GTB will be up to the task though.
I run Tekin gear, but don't buy into the whole manufacturer war. Anything by Novak, Tekin, LRP, Team Wave, and even Hobbywing now, will be good. Not sure if I missed anyone!
What air temps do you run in, and is it indoor or outdoor?
Agama A8 Evo | GRP .21 | Spektrum | Savox
My car just hit 88mph. I hope it comes back soon....