Keep in mind the Kamui Black tips play about 1 hardness level harder than advertised. So your Kamui Black M is really a hard tip, which is why the need for scuffing, that "glass" feeling, etc. Some people like that, but most play with a soft or medium tip, which would equate to a Kamui SS or S.
I played with a Kamui Black Medium for a while, and it was just a tad too hard for me, felt I needed to keep it chalked very well, scuff to keep from glazing, etc. When I dropped to a S, it was a bit too soft. So now I use a soft and just shave 1 or 2 layers off, then right away it plays awesome without any sort of squishy feeling that you might get initially.
Of course, this is a personal preference thing, just trying to give you feedback on those tips. These are the tips I use for pool, I'm going to be getting a Longoni carom cue myself and not sure what type of tip I will end up with. May try whatever they come with (Fuji?) and just replace if I don't like it and experiment a bit.
Scott