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Ready to braze the bottom bracket to the chainstays.\nNote how the jig holds it all together? People who build diamond frame bikes can have whizz-bang jigs that hold everything just so, but those only work if you're making minor variations on a theme, even the good ones. They don't work for us. So we get stuff like this that holds bits of a bike in place at low cost (and low precision). Such is life.\nAnyway, the chainstays are bolted into the jig, there's a bar holding the main tube at the right height and another one holding the bottom backet likewise. The chainstays don't fit around the bar they're sitting on any more, they're slightly too wide (so we can over-bend them in and they don't hit each other. Once we let them go they spring back a little, and they're nearly touching...

Ready to braze the bottom bracket to the chainstays.
Note how the jig holds it all together? People who build diamond frame bikes can have whizz-bang jigs that hold everything just so, but those only work if you're making minor variations on a theme, even the good ones. They don't work for us. So we get stuff like this that holds bits of a bike in place at low cost (and low precision). Such is life.
Anyway, the chainstays are bolted into the jig, there's a bar holding the main tube at the right height and another one holding the bottom backet likewise. The chainstays don't fit around the bar they're sitting on any more, they're slightly too wide (so we can over-bend them in and they don't hit each other. Once we let them go they spring back a little, and they're nearly touching...