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...