John_Mc,
I learned a lot from your comments on this thread and appreciate your efforts to makes some sense of this topic. As a "weekend warrior", (and I suspect 95% of us are), we do not know what we do not know. I am guilty of using a chain well past when it should be sharpened. I will no longer do that as the Pferd tool will be easy for a novice like me to use. Like you said, it is not perfect, but good enough and way better than an ignoramus like me attacking a chain with a hand held file.
Although it is interesting to learn what heavy users do, their needs are different. I find too many of them rabid about "their way" and believe everyone should do what they do. But many of us, lack the skills, intelligence, motivation, or are too lazy to learn. I am one of those "training wheel" guys. Makes more sense (cents?) to invest $35 in the Pferd and get a decent sharpening job for the 6 cords of wood a year I process. Sometimes good enough is good enough.
Again, thanks for your input.