This old Stihl grinder works wonders. I still hand file when I'm out in the wood pile, but it is nice to be able to return to an even grind on both sides, especially after you nick the blade, or loan the saw to a friend... There are also different stones so that you can grind down the raker teeth to produce the proper chip size as the cutters are sharpened down.
That's the same one I use at the shop I work at.I wish I could get a better source for wheels,though.The Stihl ones are so spendy,and they are so soft you constantly have to re-dress them to get the profile right.The ones we currently get are made by Silvey, and from I think it's called " Alhberg Equip",and they cost way less but they still don't retain the shape for long,by the halfways point on a chain,you have to reshape the stone.
I wish the boss would pop for a diamond wheel,but if the pores gets plugged,I've been told they are ruined.I think they cost up in the $300.00 area for each wheel,so that's why that won't ever happen.That would solve the reshaping problem.
I also wish this model of grinder had an adjustable offset on it to compensate for when the wheel dia.gets smaller.
For hand filing,I saw a picture the other day of a new file setup that sharpens both the cutter and the raker at the same time.I think it's a new accessory available from Husky.
Steve