Okay, I did my homework. The images will be big, photobucket has no shrinking option there. Taken with my 5mp phone. Just save the pics on your desktop for further study. It's been in use since June so it's a little dirty. It's holding up real well.
I used 2" PVC connector. The backing is from some sort of 4-6" PVC lid used for god knows what. It was flat, all I had to do is knock off the center piece, hence the little missing material at the inside bottom. The hook is tricky, I chopped a piece of the same connector material and stuck it into the belt sander crack at an angle where the sandbelt disappears. You will mess up a couple of them until you find your groove. Also the placing of that widget was a pain to get it exact. The bonds a holding great, no problems.