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I cut the existing steerer somewhere below the top headset bearing. Then cut the new steerer to get the overall length I want.
I then machine a plug that fits into both steerer parts. Steerers taper internally so in this case the plug measured 25.1 and 24.3.
I try to get a tight fit and press the steerers together with the plug inside.
Then I use a V block with its clamps to make sure the steerer is straight and tack the steerers together. I then rotate in the v block and check straightness and tack again. Then I take it out of the jig and fully weld it at high amps. In this case with pulse and a good gas lense. 160amps as my max. Then I file and sand it down.
Whats the procedure like exactly? Do you silver braze these? Preinsert the coils?