Solidoodle well nut anti-backlash (aluminium platform)

A simple retainer plate for a $2 well nut. You can use the existing holes on the platform, you don't need to drill or thread anything -- this was the simplest approach I could find/think. Also, the rubber should act as a spring, which is nice (I guess).

I have one of the new aluminium platforms, so previous fixes needed modification. Credit for this approach (which was the simplest I found) goes to http://www.soliforum.com/topic/2341/poor-mans-antibacklash-nut-no-assembly-required/, but th