[Cecil]

On the bottom of the Open 4 motor .vi, there should be two more terminals for inverting motors. Make sure that the two sides are set to the correct inversion (you have one left motor inverted, create a constant on the other left motor on the bottom and invert it too). This will prevent your motors from working against each other in the gearbox. If the robot is still backwards after inverting that left terminal, set both left boxes to false and set both right terminals to true. This should get you working in the right direction.