Terry!

I use 600 grit wet dry sand paper and then when I get them near sharp, I polish them with a 1200 grit paper ,it only take's a few minute's per head as long as you got a very flat surface to use and they come out razor sharp.I'm going to pick up the proper stone for the G5's because I'm sure this is the head I'll be using for a very long time and I think the stone would be worth my while to invest in since it's tapered for the G5's cutting edge's and make's for no guessing on the angle's.

nubo