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• MECHANICAL VIBRATION - A suggestion for minimizing the chance of mechanical vibration and rim flexing "breaking" the plastic: use the 'isolated-mounting' technique where you attach the plastic to the rim.
Specifically, place a rubber or neoprene grommet inside each hole, through which the mounting bolt or screw passes; and use a flat washer (between the bolt head and grommet) to spreadout the clamping force onto (first) the grommet and (then) the plastic. Thus, using the grommet as a flexible "vise-grip" to hold the plastic.
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