My Ritter RSK came with a VERY sharp edge, and I have yet to find the need to sharpen it, but when I do ...

My Sharpmaker's recommended procedure is to use the 40 degree holds. This provides a 20 degree angle on each side.

It gives a secondary procedure for use if the first procedure isn't working: Use (I think - its not here with me) the 30 degree holes followed by using the 40 degree holes. This creates a 30 degree back bevel with a 40 degree edge.

In understand the trade-off between edge angles: 30 degree slices better but dulls faster and 40 degrees slices a bit less but is slower to dull. I also understand that the S30V blade should do better than most in staying sharp even with the 30 degree angle.

Now, apparently Doug's RSK comes from the factory with a 30 degree edge. Should I just use the 30 degree holes on the Sharpmaker to maintain that angle? or should I use the 40 degree holes as recommended in the Sharpmaker instruction?

Also, does anyone know what the angle is on the Gatco Micro-X sharpener?