We decided that we will use the electric motor as an accelerator assist. This will help reduce the amount of time required to accelerate the cart to cruising speed. When we hit full throttle on the gas pedal (cruising speed), the full throttle switch will be activated, opening the circuit. This will shut the motor off and allow for full gas operation there on. From the tests we found that the most inefficient fuel economy comes from when the cart goes from zero to cruise speed. Here is a 3d model of the potentiometer/throttle cable assembly.