This is a combination of ideas I got from other stands online. I MIG welded it up from old bed frames and the main square tubing was a salvaged store display pedestal. The clamp is a standard Pony woodworking pipe clamp with a couple V-grooved wood blocks as pads. It is stationery (no swiveling) and will grip the seatpost after I wrap an old innertube around it. The rear braces will be through-bolted to my 4 x 8 work table (the 2 bolts pictured) and the front edges will just be clamped to the edge with C-clamps. I may end up through-bolting them too, at some point. It's easy enough to just use big wing nuts/washers, though. It's solid as a rock. Best of all, it was completely built with junk I had lying around-----even the paint! I'll post a pic of it in use soon.