I have tried several different ways to sharpen the Grizzlies and by far,the best method I have found,is to use them in a KME broadhead sharpener on a DMT 120 or 220 Diasharp,diamond hone to set and straighten out the bevel,which goes very fast-a few minutes.The Diasharp is a 3"X8"X3/8" steel bar,the top surface of which is impregnated with diamond.After the bevel is worked out,I continue with a sreies of different grit wet or dry sandpapers,laid on top of the Diasharp hone.320,400,600,1000,1500,2000.It only takes a few minutes to establish the bevel but after that,it goes very fast.It only takes 6-10 strokes with each grit after that.You can stop at whatever grit you like or continue on and strop on cardboard after 2000 grit.You can see your reflection in this edge.
The flat,steel,Diasharp hone and KME broadhead sharpener,create a perfectly flat,true bevel.Ones that I have measured,come out to 26 degrees.The new Grizzlies go faster than the old.The 120 hone cuts faster and costs more than the 220 but the 220 works very well.I cut the sandpaper sheets in threes and after sharpening a couple dozen heads,I am still using my first piece in each grit.
Best price I have found on the 3"X8",220 grit
Diasharp hone is at sharpeningsupplies