Gotta love the little-big D'fly!
I was the one with an Endura that was having terrible wire edging for the first two sharpenings (which I didn't realize the first time 'round, but resolved on the second go) and 1 to 2mm sections of the edge fracturing out with normal cutting tasks.
It seems like mine must have had either an inadequate relief stage in the HT, or more likely got overheated when the factory edge was applied, because I used it for yard work today, which included cutting hardwood and some cardboard breakdown and the edge held up perfectly.
Turns out that third time was the charm and with enough stock removal from the edge I got down to the "good stuff"... this third sharpening went deep of necessity (had to get rid of those big chips) and seems to have finally removed all of the flawed edge steel, I didn't really have any wire edge to speak of either and got a clean apex with ease (same stone progression and just a slightly higher angle than before: 15 DPS, no micro bevel, whereas the first two attempts were at 12.5 DPS).
This behavior is exactly what I'd expect from a craft made Japanese woodworking tool or traditional pattern knife, but not a machine made kiln/salt bath HT'd blade from Sakai... but all's well that ends well, now I have a solution if my V-Toku2 Delica shows the same tendencies!
still more knives than sharpening stones...