This thread encouraged me to get my cart mods done. I'd prefer a folding handle, but without the hinge this is a very sturdy setup:
Start to finish:
Parts: 3/4" nipple and 45 degree elbow (two each)
IMG_6728.jpg
Secure the elbow to nipple real tight like so...
IMG_6731.jpg
Take it to a grinding wheel and cut down the threads and center shaft until it fits in the cart base (took me about 2-3 minutes of grinding)
IMG_6730.jpg
Then ground out the inside threads (pure luck I had that grinding bit that fit PERFECT inside IMG_6736.jpg
cont.