Many years ago, when I was first learning how to use my Sharpmaker, I used it to completely reprofile my large regular Sebenza. It had come dull brand new OOB. And especially duller at the tip. It took a lot of time, but I was able to thin the edge out and even made the tip sharper as a result. I'd already heard that running the tips off the rods could round a tip, so I was careful enough and never rounded a tip on any knife using the SM. Because CRK uses convex edge bevels, it took longest to work down the "shoulders" and start working the edge itself, first reprofiling at 15 DPS, then finishing at 20 DPS.
It wasn't because the then-S30V blade was hard in itself that made it take a while to do; it was the thick, convex bevels. It actually took me several days, off and on. My Insingo's blade came noticeably thinner and more consistently sharp at the edge than my 2002 large regular. So I know when it comes time to resharpen my Insingo, it will be much easier. I like using the SM because it only removes a little metal at a time. I don't want to accidentally remove too much at once or incorrectly. And it's not necessary to use lots of pressure on your strokes with the SM. My mentality is, 'easy does it'.
Jim