Ahem, see post #28- http://www.bikeforums.net/showthread...1#post15225112

The milk crate is the first thing I tried. The pros (lots of real estate to hang lights/reflective material, great way to haul the gas can for the mower) could not overcome the cons (harder to mount the bike by swinging a leg over the saddle from the rear, fully loaded backpack [that I was using at the time] wouldn't fit, my tush would rub on the crate while on the saddle ) that I experienced.