To the OP. I think horizontal dropouts would be better. A discrepancy in chainstay length is multiplied by about 2.5 at the end of the rim. I.e. a chainstay shorter by 0.5 mm moves the rim off-centre by 1+ mm. The other thing to worry about is matching the dropout heights, but you can set that right before brazing the seatstays.
Last edited by tuz; 12-19-11 at 01:23 PM.
Reason: bad maths