"Morgans" wrote in :

I would suggest one modification. A bar on a pivot that can be lowered over
the clamps a few inches below where they sit, for when you move the cart.
It seems I always hit a cord or block of wood, the rack stops quickly, and
half of the clamps fall off on my head or toes.

Easier and cheaper means of accomplishing the same purpose: drill holes in the frame to
hook bungee cords into.