Dave you busted me. Dam it, do you always have to be right :D
i use the same 'suspect' one and works just fine. it has however started to warp.
Panda, Tell us more about your approach? compounds...
I just lay it flat horizontally on prep table and use moderate pressure, unloaded. Angle of approach is that of higher than the edge, I'd guess 5-10deg more. Starting at the tip and sliding on a bias ending with heel.
Panda, Thanks. I loaded mine with 1u Diamond spray. Tried raising the blade above sharpening angle but it just rolled/polished the edge. Given the you've had success, probably means my technique needs work. I'll give it another try.
Doubt it, you probably got a p.o.s. One.. Quality control issues maybe