How important is it to strop on a horizontal? My strop is suspended from a bolt about chest height on my bathroom door. I sit back on my bathroom sink stropping at about a 30 degree angle upward. I started this way because it gave me a better sight-line on the leather surface than stropping at hip level would do, so I could see for sure that I wasn't lifting the spine, that the edge contact was good and stable, etc. Now I've just gotten used to it. No edge-rolling, no problems, but I wonder if I might be missing something...