Tripod Quick Release

This is a quick release mechanism that fits the plates found on the Velbon QB-4W. They are pretty cheap and common. You could also [print your own](http://www.thingiverse.com/thing:100284). By itself it is not very useful. I plan to use this mechanism in a mini-projector mount as a means to quickly attach and remove the projector. But, I am sure there are a million other things to do with it. Knock yourself out. It is parameterized for other **square** quick release dimensions. If I recall correctly the screw is an M6x10mm with a 10mm nylon nut on the bottom.