Alright sounds good. What I'll do is keep learning on this 1k/4k/8k arrangement until I can get a really good edge on the 8k, and then if I find that slightly unsatisfying go even higher. For now my problem isn't that kind of precision anyway, this cheap razor I'm working on for example will not cut at all even after a lot of time on the 1k, so there is much learning to do yet.