I got the base painted, with ice blue gloss that I happened to have. I epoxy'ed the bits of wood to the pony clamp.
Last night I worked on getting the flange connected to the base. (I'm learning new words here. The flange is the bit that connects to the base, and the tall pipe screws into the flange. Then I came across a word "countersink". Huh? Eventually I figured out that means I need a wider hole on the back side that the nuts & washers fit into. Uh oh. I don't have the tools for that.
I managed to create big enough holes for the nuts, but not the washers, using my largest drill bit and leaning it around to make the hole even bigger.
Once I got that on, the rest was easy. Screw the tall pipe into the flange, the elbow bit onto the big pipe, the piece that adapts from the bigger diameter of the elbow bit down to the smaller diameter of the short pipe, and then the short pipe. Then the pony clamp with its glued on wood bits, onto the short pipe.
Not quite done yet. At the bike shop we planned to glue pieces of inner tube to the wood bits, for better grip on the seat post. Now I'm running into a little trouble. The inner tube doesn't want to stay in place while the glue dries. And it needs two pieces of inner tube to be the right size. I think I've got it worked out now. I have the 2nd piece of inner tube wrapped around the seat post, and that is actually in the pony clamp (sans the rest of the bike), holding everything in place while it dries!



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Looks like the way you arranged the clamps you could just wrap inner tubes in the jaws if you have too much trouble with gluing.
