The prototype Scooter did not need this reinforcement. Because the lever has to turn freely on the pivot it can not be bolted firmly to it, so allowing it to sag. It needs to be thicker. The photo shows the solution.
An alternative design for a castor has a single wheel. The mounting could be made from strip aluminium or brass about 10 mm wide.
This completes the mechanical side of the robot apart from mounting the circuit boards when they are ready, and a few other items such as LEDs. Boards are bolted to the lid and the bottom of the box, using 15 mm M3 bolts and nuts.
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