Thanks all. Yes this build is for me. Had I not had this issue, I would totally feel comfortable with it going to someone else though.
[MENTION=554]doug[/MENTION] - I pretty much did the same (or so I thought) thing, but in a vertical fixture. All the main tubes were mitered and dry fit in the lugs many times prior. Everything was great.
[MENTION=136384]unterhausen[/MENTION] - So you think springing the tube will work and brazing will work? The miters are very good and once it's put in place, they are very tight. Yes, the only things that are officially bad are the DT and BB angle. The ST is already brazed in. I did order some new tubes and shell though just to have something to fall back on. I assumed that grinding out a DT in the BB pocket would be pretty tough and tedious at best.