[morzh]

Jerry

Just to reply about "difference in diameter" (not to argue the point but just to explain).
What matters is whether the same diameter touches the rollers (and the blade is in between) - and it does. So your cap nicely rolls as you want it and the blade can be positioned at the bordering part of the narrow and wide diameters.

PS. Honestly, I do not watch Olympics, never did. I am not into sports. The fact that the Olympics are held in Russia do not make it any more interesting for me. My wife does watch it, and my son has to do some watching as they got some "progress report" on a sportsman of their choice to do as a school project (which to me is stupid - what if I do not like watching sports and am not interested - why am I then writing about something I couldn't care less about).