A story of which the Saffas may not be aware.
Darge and Connor Boyle were outstanding youngsters. But Glasgow showed no interest, so both ended up at Edinburgh where they got hardly any game time due to Edinburgh having absurd back row strength. Glasgow meanwhile were short of backrow cover.
The SRU stepped in and told the two clubs to sort it out, so Miller and Darge went to Glasgow. Darge went because Edinburgh rated him as the lesser of Boyle and Darge (and to be fair, now that Boyle is getting game time he is also coming through). Darge seized his chance with both hands as if he was still at Edinburgh there is a good chance he'd barely have featured.