I'm a daily commuter and errand runner for a total of somewhere between 12- 20 miles per day. I use a chrome messenger, which I love, to carry everything (including my lock) all over town. There are only a few instances where I actually need my lock so I get a little aggravated that I need to have it on my back on day. (Please don't suggest panniers, I've got them and don't like to use them) My waterbottle and pumprack take up the space inside my frame so I'm curious if anyone here is familiar with a way to fix my lock (bulldog) to my rack in a way that is sturdy yet easy to get on and off?