I bought this cheap air saw from harbor freight quite a while ago. The saw has come in very handy a few times. This tool has been great for trimming the jigging tab of the rear spar. The tool fits in tight places, so I can trim the spar whiout removing the skin. I just peal the skin out of the way and stick a couple pieces of wood between the skin and structure to keep it clean of the saw. It takes all of 10 seconds to trim the spar accurately.
The blades that come with the saw suck and dull quickly very quickly. HF sells replacement blades for the airsaw, but they will have the same issue. HF also sells blades for the electric version of the same saw. These blades are cheaper and slightly more course. They seem to hold up well so far.
