On the one I have, I ended up welding a piece of 3"X1/4" flat bar to the back side of the upright. It looks like a capital letter "T" with the upright being the top of the tee and the bar stock is the vertical part of the tee. This flat bar ends about an inch below the pivoting point. I then made a box that fits over the plate with a pin holding the box upright. So when I start working the box is where I put all the removed fasteners.
I also made a new faceplate that is one inch thick and is threaded so I can fasten the holding arms where I need them. This also took care of the flimsy face plate that came with the stand.
My next step is to put a bushing in the piviot head so it will rotate easier.