Great question - yes. Between my LBS guy and Richard Schwinn (that guy) there has been quite a bit of extensive measuring, discussing, and more. I also spoke with Tom at High Sierra to confirm our thinking. Hope to have the drawing in the next day or so, I'll try to share that here also.
Considering the options for the freakishly tall (ill fitting stock bikes or very high dollar custom builders), I thought this was the way to go. Time will tell...
Thinking mainly Ultegra components - but part of me REALLY wants to build up a set of wheels with either PW or CK hubs... LBS guy almost has me talked into a Brooks too.