I got these knives from a wholesaler and the second from bottom had a crummy edge, very steep angles which doesn't allow it to be sharpen very well.
I set up my EdgePro clone with a 180 grit stone and used a lot of elbow grease.
Lots and lots of elbow grease.
It took me hours which I spread through the week and finally got it today. It's all done with a 180 grit. I haven't got around to fine honing yet as I'm tired.
That 440C steel is pretty hard metal. Whew! That was fun.
Yet it's pretty sharp now.