Okay, here goes. I found this group when I came up with the need for a bicycle repair stand. My wife decided that she wants to start riding a bicycle to work and brought home an old '63 Sears Flightliner which needed just about everything. I've reached an age where I like to keep my work at a comfortable height so I ended up registering here in order to see the pictures of homemade repair stands. Thanks to everyone for all the ideas.
As a base for the stand I used a piece of 1/4" plate that I had laying around which weighs near 20 pounds. I also have about a 25 pound cast iron plate laying on the base, seems plenty solid so far. The column is 14 gauge 2 inch square tubing at 64 inches tall. The receiver tube for the clamps is a bit of the handle cut from a rebar bender as it was the right size to work with 3/4 inch pipe and is centered at 62 inches from the floor. I made a tool tray with 16 pegs and a "cup" holder and added a couple of hooks to serve as a rear triangle type stand as well (it's handy). The most solid of the two clamps that I built was the Pony clamp to which I added leather padded, drilled and tapped, angle iron jaws. I also made a "quick clamp" from a Vise Grip brand welding clamp which has jaws of angle iron lined with leather. The two clamps are interchangeable, depending on just how solid I need the the frame to be clamped in place (the vise grip is easier to clamp with one hand). The Pony clamp is, by far, the most solid of the two as the Vise Grip arms have a bit of flex.
As requested, here's a few pics. The upside down Monky Ward Hawthorne (?) is my wife's next project. Building the black and chrome Sears Flightliner was the reason for building the stand.;