I have a technical problem for all you mechanically oriented cyclists. I'm looking to use some sort of "quick release" system for solidly attaching a standard milk crate to most standard rear bike racks. Zip ties work great for a permanent a solution, but I'm looking for a technique to be able to quickly attach the crate and then quickly remove it after I am done. We have a "Meals on 2 Wheels" program delivering meals to the elderly. A quick release system would mean our volunteers would not have to permanently modify their bike. Any ideas would be greatly appreciated. Thanks!