Just FYI -- a 15/42 combo on SM wheels and a 14/45 switcheroo for TE wheels works with only a small adjustment to chain slack. No need to swap chains. I think there might be room for a 16 sprocket for the SM setup...anybody know if a 16 will fit this bike (and if one is even available?). You do, however, need to pop the master link and unthread the chain in order to swap sprockets. Adds 2 minutes to a 20-minute total wheel swap.
It takes me 20 minutes to get the front caliper between the rim and the rotor, the clearance on my setup is super tight.