OK, it's now built up and I've been out for a few longer rides so just a few observations for anyone interested.
First of all, it feels shorter than my old Kaff although they were the same size side by side. I get a bit of toe overlap with the guards fitted even with my size 7 1/2 feet and 167.5mm crank lengths. Not a big deal but something to bear in mind. I might even have been better off with the next size up.
Secondly (and has probably been said before) it's not a light bike. A bit of a lump if I was racing it rather than having it set up for commuting & touring. Heavier than the Kaff even though it's built up with much of the same kit having re-used some stuff. I had Easton EC70X carbon forks on the Kaff but the Cross Check feels heavier than they would account for.
Nice bike to ride though. Went out with my mate at the weekend and did a 20 mile mix of urban, off road cycle paths, dirt tracks, country lanes and it's a pleasure to ride. Handles well, loads of room for bigger tyres - running Gatorskins at the moment, 28 at the back, 25 front. Looking forward to the Exmouth Exodus in June!
Anyway, I hope these comments are of use to someone.