I'm planning to fillet braze a road frame. I have a Columbus SL tubeset with a head tube suited for 1" steerer. The wall thickness is 1mm.
I've read in "The Paterek Manual" that standard head tubes are designed for lugs and are not strong enough for fillet brazing. I've also read from other sources that the head tube should be reinforced for fillet brazing.
So my question is what are my chances to get away without chosing a stronger tube and with no reinforcements. And if I actually should add something to make my head tube stronger, what should it be? Should I braze on a couple of rings on the ends of the head tube in a similar way the lugs are brazed?