John wrote: <If a long point lug were completely thinned before brazing, would there be any danger of the point warping and springing away from the tube during brazing? >
Sadly I haven't got a clue how to send photos but if you go to my blog, greenjersey.wordpress.com and look in the category Bill Philbrook you will see a Prugnat long point seat lug reduced to almost nothing by Bill Philbrook in 1978. It seems that the seat stays are finished off by brazing a plate on to the top of the tube. This looks pretty neat to me, is that the usual way to do a semi-wrap round seat cluster? Ray Green, brighton, Sussex