I just bought a pair of the Sidi Flex Force Boots last night and upon jumping on my bike for a quick ride, immediately noticed that I needed to adjust my shift lever up about 4 or 5 spline north to fit the boot under. I would have had to point my toe amost perpendicular to the ground in order to fit in.
I know it's not much feedback, but once I moved the lever up a bit, I was sweet, although, I have to take my foot a little off the peg to downshift now (At least until break in I suppose).
I wear a size 12 though, and am riding a KDX 200 so....your application will vary.
Just my 2 cents... Great boot as far as I can tell! Feels like minimal break in too!
Dave