I'm on my second OnGuard lock. Their brackets are crap! Sure, they work for a few weeks; but after days of regular commuting over slightly bumpy roads, they no longer hold the lock in place. It flops from side to side; still attached to the bike, yes, but too annoying. I hold it in place laterally with velcro, but this is a pain to manage, and if I tighten it too much the velcro pulls the lock out of the bracket.

Advice?