Good luck running a Hacker brushless or any brushless in your Evader BX. I had an Evader ST and I striped the idler gear with a stock motor. The idler gear is weak. It can strip easily.
Solution:
http://www.hobbytalk.com/bbs1/showth...142#post464142
That guy made a metal idler gear and a mod b3 diff gear. It’s very tough. It’s well worth its price. I got it for my evader. I'm was running the Novak SS Brushless and I was doing wheelies like nothing. No tranny problems at all. I would recommend it to anyone with an Evader.