Here ya go. I played around with it this evening for 30 minutes or so. It does work as advertised and if I were wanting to run square chain and not wanting to shell out the bucks for a grinder, this would be a good alternative.
First thing I did was put the chain in my NT round grinder and used a 325 CBN wheel to take the gullet out. Then I mounted it on the bar, got it tight and mounted the sharpener near the nose like Kipp suggested. The saw was trying to move around on me so I corralled it in with some nails in the bench. It took me about 15 minutes and a couple teeth to get the hang of it but after that it went well. It was a little difficult in the beginning because it changes the angles of the teeth from the factory grind, but after the new angle was established it was smooth filing. I figured out it was easier to keep the file flat on the roller if I pinned it there with my finger while filing. You are supposed to keep the file 90 deg to the roller and if you don't, it knurls it. You can see that in the photos. Keep in mind that this is the first time I have ever tried to file square chain. No experience whatsoever.
Carlyle, look at the photo of the sharpener from the top. I think this is how it should be indexed. It's possible for the index pins to go between the raker and the tooth instead of behind the tooth. If you do this, you will get the file into the body of the sharpener like you describe.
Is it worth it for a firewood cutter to run square and buy this from a practical standpoint? I guess that's up to the individual.
If anyone wants pictures from a different angle, just let me know. I'm going to finish sharpening the chain and will do a couple short videos as soon as I am able. It will probably be a few weeks.
Ian
