Having done the numbers, I was thinking of building a SS 69er from a 2009 Orange P7, all british, well as far as poss.
Designed for a 140mm, so approx 520mm axle to crown, use an on One carbon fork at 470mm, + 38mm for the additional radious, 12 mm shor, so perhaps a third of a degree steeper on the head tube would give 73deg seat and 69.3deg head, which seem like pretty good angles to me, very close to 73/70 norm.
The reason I like the P7 idea is the flexible dropouts, I don't want a mech hanger spoiling the view, I could also run a rohloff if I really wanted.
I want to run my SS rigid, so a 29 front wheel makes some sense to me, but I am not sure I want to go the whole hog to 29.
I have a rohloff hardtail and full suss so I kind of need a reason to ride a SS given I have no winter/maintenance issues so different is good...
It is either a 69 or 29er I think, I like the niner but loadsa cash for something I'm not sure of, I want steel....discuss