So the next step is the front triangle. First check the main tubes for any defects and label the short butt side.
Second, miter the 90 degree cut on the seat tube to BB junction.
Finish mitering the top and down tube and check the fit. This usually takes a little time with the file to fine tune everything.
Next drill the bottle boss holes, the slot for the seatpost clamp and sand and file the ends of each tube for welding. Clean everything with isopropyl alcohol and your ready to fire up the TIG torch.
First weld is the seattube to BB. The brass piece is the heatsink and back purge I made.
Some nice tight miters ready to tack in the jig.
More to come.
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