Here are some photos of the straps I've made for Wald folding baskets (pink ones for my mom. Aww...). I can take them on and off in no time, and have been using them for years without any problems -- I trust them enough to carry my laptop, quite often. Just get the sturdiest quick-release buckles and nylon strap material you can find at your local sewing store, then sew the heck out of them. Note that I use fabric-covered rubber bands (aka pony-tail holders) to attach the bottom of the basket to the vertical strut of the carrier rack, which I've padded with handlebar tape (sorry -- I'm a pretty poor photographer). It works pretty well for a while, but then they get stretched out. If anyone's got a better idea for a quick-releasing way to attach the basket to the vertical strut, I'd like to hear it.