I've got the bug, have a torch, but want to know how to start practicing brazing. I read the book "lugged bicycle frame building for the first time builder" by Chimonas. In the book it says to get some inexpensive chromoly tubing with two sizes that one slips inside of the other and I don't think that would be possible to get them that are tight enough to do this but maybe. I think ceeway had practice lugs and tubes. Any other ideas, best place to buy flux, bronze, silver? Should I concentrate on Bronze only at first or only silver, both? Any help is much appreciated. Thanks al.