Very nice! Rep for ya!
I should say in looking over your thread on the expanded metal sides that you should find a way to tie together the top edge of the rear. With the pressure from loaded firewood, unless you are very careful, you could spread that far enough to pop the upper stub out of the hook while driving. Something through the upper crossbar that hooks under the c-channel hook and clamps tight enough to stay there, but is adjustable to accommodate the flex that will happen from loading. I could see a hook on a long bolt into a nut plate that could do the trick. Heck, even a decent bungee might do the trick.