I've got a 30k professional but I have only used it a few times. Not that it isn''t a good finisher .... the few times I used it I liked the results. I use naturals lately more than the Shaptons and I just don't feel the need unless it is something special.

I have the video and Harrelson says on there that he thinks that doubling the grit in a progression is the most effective way. So IMO your 30k would follow the 16k. That is exactly what Harrelson does and the theory behind the GlassStone series.

If it was me I would stop at the 30k for a few razors and see what you think. You know what the Nakayama will do so shaving off of the 30 should be an interesting comparison with a razor that you know. Please keep us posted on your results. I may wipe the dust off of mine and give it a go too. You've inspired me.