B took me a few days to adjust to. It was just the muscle memory of the transition from gas to brake, it felt like a had to apply more brake pressure than usual. I think now I just need to wear shoes that put me in a position to get a better feel for the pedal and my foot placement when I'm practicing. Once comfortable I'll then practice with a variety of shoes. I usually wear ultraboosts just going out and about and the outsole tread creates too much friction when pivoting. I'll throw on some of my old roshes since the outsole is pretty worn and it's still a pretty minimal sole.