Been playing with jointing the edge for a while, depending on condition of razor. Found the corner of the hone a bit harsh, the TNT works better for me, does the same thing. Basically you are bending the fin over and knocking off the high points at a molecular level.

Seems this is one of those "whatever works" threads.
One thing is for sure, once you get that edge right all you need to maintain that edge is a lead dressed strop ...