Grizzlies are very easy to sharpen using a small mill bastard file. Tail to tip, roll a burr, flat against the back side to take the burr off, then just a couple more strokes on the bevel side with only the weight of the 6" grobet and the thing scares the hair away. Make sure the file is touching only the very edge and use VERY light pressure, and you will be fine. Probably the easiest head ever to sharpen with a file. If you are having trouble, get someone to show you in person. Jim Abel showed me one day in Michigan in about 30 seconds.