Hello! first thanks for this wonderfull forum!

I got a new Dovo Ibenholt knife and a Naniwa Superstone #12 12000 stone. Im wondering which waterstone i need, would it be enough with the norton 4000/8000 combination stone to fill the gap to 12000? or would i need a 10000 aswell? Ive tried sharpening it for a long time with the 12000 without getting it sharp hehe.

Also i have another question, i have some chroma 301 kitchen knives, and you can buy a wetstone set to sharpen these, going from 200-8000 could i just buy the norton starter kit set or something similar too sharpen both the straight razor and the kitchen knives?
theres an sharpening instructionsvideo explaining how and which stones that are used here



thanks very much for all the info i get, really helping me alot!