So I bought a couple of the Tojiro ITK's from Mark, a 120 and 150 petty, strictly for the purposes of experimentation. I've removed the handle from the 120 and polished out the kuro-uchi finish up to P2000. The blade then went through 3 trips in a boiling vinegar bath. Nice, deep kanji is a definite plus here.
I've got some buffalo horn and a piece or two of stabilized wood for rehandling, but may just start with some plain old cherry to see how I do with the process. I also have a 210 ITK that will get done after I practice on these two. If anyone has info on ferrule fitting, I'm all ears. My plan is to turn the front on the handle down to fit a "back-bored" ferrule.
These knives take an unbelievable edge and are really a sleeper, IMHO. There just can't be much easier, better way to get into carbon than these Tojiro ITK's.
Thanks for looking.