How you going to stop the foot plate from departing from the sidestand ? It's looks like it's just some pressure the assembly, but these bike vibrate like crazy, I could see the whole thing becoming loose.

You probably want a small securing mechanism on the base of the foot plate to stop the sidestand slipping backwards.

I wouldn't worry about the base wearing on the bottom, mines 10 years old this year... and it's still fine (I made one similar to yours back in distant history)

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