We built several along that same principle years ago. Only major problem we had was the center of gravity is real high, so when it starts to tip over...it's over. Had it happen bad once, when we were way back in, on a steep mountain trail, and we were young and strong, and so we tried to save it from rolling over down the hill. Both low side handles broke, and down over the hill it went...and went. They worked much better than the two wheeled ones ones on side hills though. An old style Stokes basket, (the wire covered ones) worked well for a base. Made two out of those. Also, don't take one into a wilderness area, as it is considered a "mechanical means of conveyance". Learned that lesson the hard way back in the early '80's