I learned to debone the tail another way.
Just make a cut all the way around the base of the tail to seperate the skin of the tail from the skin on the body. Then take 2 pencils and clamp the tail firmly between them at the base of the tail and hold the squirrel body in one hand and the pencils in the other. Now just pull and the pencils will slide the tail right off the bone.

I prob make it sound more complicated than it is but if you do it a few times it's very fast and easy. Takes like 20 seconds from start to finish.

On another note it takes me 10 minutes to clean a rabbit but I saw a guy at a wildlife and fisheries demonstration one time do it in about 40 seconds. I was 14 or so at the time and wished I'd of paid more attention to exactly how he did it.