I must admit that I have not had the driver board in my tiger out for a while. From what has been posted here, the driver board only has FOUR power transistors... that are all the same type? Then HenLong is NOT using an H-bridge config to drive the motors bi-directionally? Does anybody know what type of circuit configuration they (HL) are using to get bi-directional drive independantly to the two track drive motors and the turret traverse motor? I was toying with the idea of replacing the motor drives with beefed up MOSFET H-Bridges. But, if HL is not using H-Bridge config to get bi-directional control, then the MOS FET bridges wouldn't interface correctly...

Ideas??