Never tried Hybrid K3 as I feared it would be too hard for my liking. When Tibhar introduced the Hybrid MK, I was curious so I purchased 2 sheets in 2.0mm.
Current setup: Viscaria (87gr), FH: Bluegrip S2, BH: Hexer Grip. Played with the MK on both FH and BH a couple of weeks in the meantime...