I know I shouldn't say this, but perfection in sharpening chisel edges, whatever philosophy you adhere to, is basically a waste of time, propounded by non-producers, in the commercial sense.
If, by whatever means, I get a good edge, ie shaves off my forearm, that's good enough for me: for a minute or two:ie before the chisel gets hammered in whatever situation I am putting it to, gapped, or whatever.
Today I gapped a Japanese mortise chisel I was given 10 yrs ago on a nail inside a 200 yr old door: I reasoned, that is good service. I'll regrind it on my Tormek as quick as I can, it reduces it a bit, but it will probably last me out.
Planes, maybe...but chisels:no.
