Watched the videos, really surprised at the results! Kind of weird to have a coarse finish on one side and fine on the other. I've been experimenting using an extra coarse or coarse diamond stone and then refining a little with a spyderco medium. Very bitey but fine at the same time.
Don't know if I'll do coarse on one side and ultra fine on the other, but if it works? Can't fault it.
Spyderco : Resilience, Tenacious, Persistence, Manix 2 G10, Para 3 G10, Para 3 LW, Paramilitary 2,
BBS Paramilitary 2, Amalgam, Native Chief, Blade HQ Manix 2 XL, S30V Shaman, Gayle Bradley 2, DLC M4 Shaman, Magnitude, Z Wear Shaman, DLC S30V Shaman, Stretch 2, Kapara, CF/S90V Native Chief, Endela