ok, I realise it’s a newbie question, but is it possible to sharpen m390 well using wet and dry sandpaper on a glass back, followed by a leather strop, or is the stuff just too hard. I’m used to sharpening chisels, planes, and carving gouges, but these are straight forward, I have little experience with knife blades, especially these new steels. I’ve just ordered a Lionsteel Barlow made from m390 and I’m planning on building a homemade sharpening jig to keep a consistent angle. I’ve heard rumours that you need diamond to sharpen m390??? I only have the small DMT credit card size diamond hones. Other than that I have king water stones, and a Smiths Trihone system. Any advice would be appreciated.