Search:

Basically no. The Norton is bigger than the 6" DMT so would be maddening to measure flatness & then have to lap specific areas of stone. So easy to get it wrong unless you've done that sort of thing...

A man walks into a parachute shop & the sales man tries to sell him an umbrella.
Worked for Mary Poppins, right ? :p

You can't compare Barber hones to sharpening stones. I've honed on 1x4"...

Yes they come in varying lengths hence different code numbers but the C = Coarse = 325 grit

I'd drop the Norton flattener & the coticule & use that money for a diamond plate for the 4/8k.
You can cheaply improve the 8k edge with pastes later if needed.