The dropouts and chainstays are ready to be silver brazed.  I mock them up with the bottom bracket at the designed length of 410mm.  I didn't realize the fit into the dropout was a compound angle, more work than anticipated.  Because I have to compress the seat and down tube angle, I will have the full frame in the fixture when I tack the front triangle.  This way, I can insure the seat tube/chainstay angle won't be compromised.