Cannot overstate the awesomeness of the 30BSP/32BSP cut. If you have any sort of thighs and want a cut w/ a nice clean taper, these are it.
I have them both, and the cut is so good. Needless to say fabric and fabrication are excellent as well.
If I'm sort of right between sizes is it better to go up or down for Free Flyknit Chukkas?
I've tried on FKs Lunar 1s and Trainers. 11s are a but snug over the toe, and 11.5 is a little looser than I'd like but either way could work. Never tried on Free FKs.
*Obviously I should just make time to try on, but that's actually far harder than it should be for me.