I just spent an hour fitting my new disc setup with my newly built front wheel. Only done a short shakedown as got a few things to fiddle (slightly warped rotor - typical of a new disc, got to get the alignment properly sorted and shorten the hose), and still need to properly bed in the pads. Promising so far though.

Hope you're doing good with yours julian. One quick Q.... you've got vertical dropouts so have you got an eccentric bb to get the chain tension? Or a tensioning device?