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I must have gotten lucky because all of my Emerson's sharpen with the 20 degree setting on the Sharpmaker. I'm guessing the angle is about 17-18 degrees on the beveled side and under 1 degree on the non-beveled side. 10 passes on the beveled side then 1 pass on the non-beveled side and they're sharp. Do it again with the ceramics and they're scary sharp. Probably the easiest knives to sharpen in my entire collection.
I haven't had much luck stropping on cardboard and the like... like you said though, just "freehand" it on the Sharpmaker by tilting the knife to adjust for a more obtuse angle.