Not much love for the 180mm? I might give an Aritsugu a try they seem to have a large selection of sizes especially on their a type steel.
I've seen a couple of opinions about FKH here. First one, then another one, and maybe that one.
Oh man! I have to work. :-/ But I guess I can just drive across the river and buy you a beer haha! It's been a while since I've seen your shop anyway.
My experience is similar - Yoshikane SLD takes a great edge and holds it surprisingly long. Micro bevel is a good idea (as it is with SKD steel). Also