I'm not 100% sure, but that cutter might only do .325 chain? With hand files, you use 7/32" for 3/8, and 3/16" for .325 chain. I have a granberg as well, and I can't say enough good things about it. It was one of the cheapest options, it can sharpen any type of chain (there's even guys who use it for square file with slight modification), and it gives perfect results every time. I bought it specifically to do my own milling chain. It's hard to find locally, so I make my own from used chains.
Sounds good my jig will be here Friday I have been using Oregon files Question for you and every one , are there better files , what do you use?
I picked up some Vallorbe files from Bailey's, after the one that came with my Husqvarna file kit was pretty worn. I'd say they were about equal. Re-filing 28" and 32" chain down to 10 degrees puts some miles on em. I'm still on my first Vallorbe, but it looks about like the Husqvarna one did when I replaced it. It still gets the chain sharp, it just doesn't cut quite as well as it did new. But it doesn't really matter on the Granberg, because you just use however many strokes it takes to get down to the stop. I'm guessing there's better ones out there, but these are working for me. I'm not a sharpening pro by any means - the Granberg really does most of the work I think. They feel factory fresh when I'm done, and the edge seems just as durable too.