It'll be a bummer if the mudguards won't fit with the 38s you'll have to get some pics up when you've got them on with the 35s to show the clearance left.
Can't get a mudguard on the front with the stock tyres - just tried it; I suspect that the outer row of knobblies is the issue, although clearance under the fork crown is a bit tight even without the guards on. I didn't try the rear mudguard, since it's currently attached to the Day One, but given that there's a bit more clearance at the back it may be less of a problem.
The frame does have Crudcatcher bosses on the downtube though, although you'd probably need to be creative with a couple of spacers to stop the guard interfering with the gear cables. I run a Crudcatcher on my Surly 1x1 and it's surprisingly good at keeping the muck at bay.
The 38s problem won't stop me from getting the frame if my cube sells. Hope the 35 marathon winters will fit with guards, they look chunkier than the 35 contis.
35s with studs will be marginal with a front mudguard, I reckon - Crudcatcher might be the way to go. 38s? No way, unless they've got a very square profile. Again, feel free to prove me wrong
The nano 40 tyres look like they'll be a great summer tyre, they should be okay on tarmac too looking at the centre tread.
They've got the same tread as the 'regular' Nanos by the looks of it - they roll really well on hardpack and gravel, although obviously they're a bit sketchy in corners on loose stuff - I'm running 2.1s at around 45-50psi. I love 'em, and I'm planning to run Nanos on the Fortitude fixed when I do the Dorset Gravel Dash at the end of May (they're also what I'm planning to run if/when the Tour Divide plan works out)
Get your guards on, that'll get you off the turbo and onto the road.
Oddly enough, the Croix is on the turbo at the moment
I figured it was the best way to get the position dialled in
and get used to using gears again before going out for a 'proper' ride. I was right, although I only needed to tweak the saddle angle a little bit. Fitted the bottle cage that was on the Day One (now the 'designated' turbo trainer bike) so in theory I'm good to go.