Yah I'll probably keep mine. If I size down, it'll be the same case as the Rafs where it might be too tight and narrow. Mine fits comfortably so I'm good with mine. You bring up a good point, they really are surprisingly narrow for a sneaker, which makes them "feel" as though they fit despite the length. Makes me wonder if 43 would be any narrower, or just shorter. Anyway how much extra space do you have in front of your toes? I've got a good 1" or so.