Well spotted Harry, that's your cranks and ring, the cherry on the cake for this build. I realy like them a lot, when finished I'll post the speclist:
The 38 Boone ring is up on my Uno 32, so it's the largest cog I have in the rear, a 19. Thus making up the classic 2:1 ratio, but 29er wheels mean the gear-inch is longer. It should be about right though as the local trails are quite flat and 29ers don't just "look" really fast
No proper ride this weekend, the LBS didn't have spacers and I'm away until tomorrow evening for a family visit.
Thank goodness a Singular that looks good! They are really nice frames (I wish I fitted them), but people always seem to build them with drops and a brooks saddle. Yours looks much nicer, very nice!