Anyone with muscular calves own Sidi ST boots and have any problems with them being too tight? According to the boot description, at 12.5" from the heel they should accommodate a 15" calf, but that is not much if you count leathers and socks on top, since they added like 3 inches to my own measurements. I read one review where the guy said his 16" calves fit in fine with room to spare even with leathers on, but he didn't mention what size boot it was. Also, any preferences as to the Air version versus no perforation for typical PNW weather? Not in a position to buy a pair of each, and it seems like it would be better to have warm sweaty feet than rain-soaked cold ones.