I have bought 2 e300s recently ($5 and $30) and was able to salvage the motors, controllers, and throttles. On one, I had to open the motor and align the magnets back into their chutes with some string. I then pulled out the string after clamping it closed. It works, hope it stays that way.
Anyway, I want to know if I can use these motors in forward and reverse? If so, can somebody please point me to a low cost controller that supports both directions, and ideally, variable speed control? This is for a paddle boat project.