My bad. Yes, 0.035. My recollection was hazy, but now I see that the CK is adjustable from 0.025 to 0.100". I just didn't know how fine I should go.
.035" would probably be just fine. It's certainly a good starting point. As long as all the kernels are crushed and you get relatively consistent efficiency from brew to brew it's fine. If you want to (try to) increase efficiency narrow the gap.
I think the knurling on my BC is starting to wear, so I'm seeing some uncrushed grains on the first pass, so I occasionally double-mill the grain. Since your mill is new, and presumably free of defect that shouldn't be a problem for you, so a single pass should be fine.