A few years ago I built a carryall that was easily detachable so I could drop off my tools and still use my tractor for other things. http://www.tractorbynet.com/forums/build-yourself/108680-carryall-twist.html I've since made some changes to it, added feet and removed the wench since I never needed it. I also added a couple other "jobs" for the base frame. Here's the carryall as it was planned: