Olly i would like to begin by saying that I in no way mean any offence, it is clear you have the retrobike bug and are well on your way to divorce and destitution along with the rest of us
however and this is just my opinion which nobody takes any notice of anyway
have you ever heard the term "polishing a turd" it doesnt matter how much you polish a turd, it will always be a turd, albeit a shiney one.
my point being you are gathering together some lovely quality bits, but that frame is a turd, it will always be a turd in my opinion it looks like a turd.
so in my lovely most honest no offence meant type way i think the next part you buy should be a nice quality frame.
Im sure the bike rides very nicely, but you hang them bits on a decent frame and you will wonder how or why you ever sat on that thing.
Im not being snobbish or owt, i just keep looking at the pictures and feeling the whole bike is being let down by the frame and the chainset.
build it back to original and use it as a pub station hack bike in the hope it will be stolen or broken in the near future.
then find a lovely frame and build a lovely bike, you clearly have a good eye and are adept at getting quality bargans too
just my thoughts on the matter
right im off to ride my Tesco BSO, with full xtr gruppo and carbon kit