I help out an older couple down the road when they have trees blow down or have dead ones that need to be taken out, in exchange for the wood. Too bad they have a lot of Tulip down there. I don't take that home, but I've gotten some Pignut, Cherry, Red Elm etc. There's a Shagbark waiting, suspended off the ground, so I'm hoping some of that is good. They have another house where I've scored all of the BL that I've stacked so far; There's none on our property. Anyway, the gentleman offered to sell me a chain grinder years ago. He had gotten it from a friend but never had messed with it much. I remembered that recently when I dulled two chains in about ten minutes, and recalled how long it had taken me to sharpen those two 25" chains. I asked him if he still had the grinder, and what did he want for it. He said "$100 sound fair?" I said I would try to find out more about the grinder and get back to him. I searched it online and what I read led me to believe it didn't take the standard 7/8" ID wheel. Well, he called me back a couple days ago and told me that since I take a lot of work off him, he would just give me the grinder. I told him that if I could figure out how to work it, he would never have to pay to get a chain sharpened again. I don't know much about using a grinder and there's no manual with it, but I've looked at the Oregon 511a manual. I guess I need to get a wheel dressing block and a template? I haven't seen much of that stuff online....Bailey's has a dressing block and I saw a template somewhere else.... Anybody know a good source for those two items, or have some good tips on how to use them? It's also got a chain break and a rivet spinner but I have no experience, other than breaking a couple of bicycle chains decades ago. Any additional grinding tips would be welcomed as well.... I see the tell-tale black streak on the wheel...but appears to take a 7/8" wheel. Looks like a quality machine.