TMK,Greg, I also use a Save Edge, probably ready for a new one because it's done it's work. I do prefer the Nicholson for lighter work and initial tiller around the handle and fade area.
If I remember correctly the Save Edge was purchased at the local Fastenal outlet although they no longer stock them they will order one for you.
The American made Nicholson's are hard to find and generally bring a premium. These I got were brand new and in the original package. When you figure free shipping that's a hell of a deal in my book. Wished I had the funds to purchase more but budget is tight.