limitations on a modern retro build (drivetrain)

[coomber]

I find modern bikes with old gear very odd looking!

 

[kool maudit]

You will have problems to mount your brake-disk to the old hub
But the frame has no canti-bolts, so you are bound to using a disk brake.
This means, you cannot use any old hubs.

But you can use the rest of the drive train - cassette (with some spacer if you want an old casette that fits your shifters), derailleur, BSA-BB and cranks.
It might also be a bit problematic to figure out the correct BB length. The "old" standard chainline was 45-50mm, the modern bikes use something 50+, iirc??

About the thumbies: Do you know microshift? They sell (index, also handlebar mounted) thumbies for up to 10 gears. And those are very good quality. They will work with your dura-ace stuff.

Edit: Oh, you changed your post while I was writing ...

thanks for the info... of course! the disks. it is easy to overlook things when you are building from the couch and not the workshop