fabsroman
Minister of Fire
For the saws you have Fabs, should be a 3/16" wheel on the grinder. 1/4" or 5/16" for the rakers.
Going back and forth between grinder and file/Timberline will eat up chain quicker than sticking to one method. There is a slightly different profile left behind by each method. The grinder often will also take a bit more off of a new chain but once the first sharpening is done, you just barely touch each tooth to restore the edge.
Alright, I'll give the grinder a go on a couple chains for the 660 and see how it goes. It will probably be a breeze once I get the hang of it. Just worried right now about:
1) Taking too much off and
2) Overheating the cutter.
I tend to worry too much about most things.