William- Yes the "skirt" is the steerer extending below the crown.

himespau- Thanks. A single shot doesn't show the planning. I did a couple of practice brazings emulating this joint before this one. Of course there's some filing (after brazing, a lot before...) but mostly of the brass flash that coats the outsides of the crown. I've been doing this part time hobby building thing for a long time and sometimes you get that groove going. Currently my torch work is better then usual. Soon this will pass. Andy