Those Japanese Dozuki saws are fabulous tools. I bought one years ago which quickly became my preferred saw, much to my surprise, as I had grown up around and had inherited a set of quality woodworking hand tools.
I have used mine in manifold ways (apart from sawing up Macs, I confess), e.g., on 1/4" veneered plywood when making panel doors for a kitchen refit. They will cut such ply entirely without tearout, something that is virtually impossible using a conventional western handsaw, or varieties of table saw. Reciprocating saws? Forget it.
The reason they work like they do is that the blade is so thin and the teeth so fine and sharp. You would indeed get a fine, accurate, clean cut on plastics using one of these that would be more or less impossible to achieve otherwise.
The downside is that the blade and the teeth are so fine that they tend to suffer from careless use, or even after a couple of years of regular, careful use, and you can't just sharpen them again like a "western" saw because of the way they are made. Maybe the high-end, expensive versions last longer, but I wouldn't know — the cheap ones have their virtues.
Lee Valley sells a folding Dozuki, which opens and folds together so that the blade is no longer a danger, more or less like a pocketknife. Very handy tool and cheap with it.
I have used mine in manifold ways (apart from sawing up Macs, I confess), e.g., on 1/4" veneered plywood when making panel doors for a kitchen refit. They will cut such ply entirely without tearout, something that is virtually impossible using a conventional western handsaw, or varieties of table saw. Reciprocating saws? Forget it.
The reason they work like they do is that the blade is so thin and the teeth so fine and sharp. You would indeed get a fine, accurate, clean cut on plastics using one of these that would be more or less impossible to achieve otherwise.
The downside is that the blade and the teeth are so fine that they tend to suffer from careless use, or even after a couple of years of regular, careful use, and you can't just sharpen them again like a "western" saw because of the way they are made. Maybe the high-end, expensive versions last longer, but I wouldn't know — the cheap ones have their virtues.
Lee Valley sells a folding Dozuki, which opens and folds together so that the blade is no longer a danger, more or less like a pocketknife. Very handy tool and cheap with it.