I have HobbyKing speedos in a clod. They are sensored, and the rear motor needs to be reversed. I put the wired like this.. A to B B to C and C to A Some motors work correctly others do not.

I had a issue with a trackstar motor for one of my clods, it would not reverse no matter what. I found that Brushless hobbies software has a reverse program. I tried it out, and it worked, but it is in blinky mode, which im ok with. Im running 4.5 in my clod, and it runs smooth for racing.

I hope this helps