I have yet to build my first bike. I am wondering about using jigs to hold the assembly for brazing. If the frame has to be cold set after removal from the jig, then what has the jig accomplished?
I really like the idea of tacking the assembly on the layout table. If one were to use several tacks, cold setting after each one as required, it should be possible to keep things straight. There would be no locked in forces ready to spring as soon as the frame is removed from the jig.
BTW, I am selling my mill, lathe and Tig Welder. Having a machine do "it" perfectly no longer gives me much satisfaction. Jerry