Disassembling the ZipZaps SE Transmitter
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1 - Remove the four screws on the back of the transmitter.

2 - Pop out the black round center cover that covers the steering wheel screw
    with a heavy duty sewing needle.

3 - Remove the steering wheel screw and the wheel.

4 - Disassemble the front and rear halves of the transmitter. Note that you may
    have to slightly pry the corner of the transmitter near the wrist strap
    retaining bar using a small flat blade screwdriver.

5 - When disassembling the transmitter, note that the frequency slider switch
    cover, the on/off slide switch cover, and the car platform release button
    will pop out.