You can spend $239.00 and buy a 4.5 Novak complete brushless system and I have not heard any complaints. Put that in the TC 4 , that is what I am going to do with one of mine. I keep 2 TC 4's at all times in case of a catostrophic incident. I will still be running a TC 4 that I am so used to.
Gofastrlbrown