Are you asking about a jig saw?? Are you asking about cutting the notches that the spars/logerons fit into, or are you talking about something to cut the sticks?

For a Jig Saw, one of the best buys on the market is for a Craftsman with variable speed drive. This is a big saw but it is well made and gives you very good control. I've had a couple of the cheaper ones, IE the dremel and it was sadly lacking in performance.

One other thing I use quite a bit is a jewelers saw with the fine #2 to 4/0 size blades. These very fine tooth blades are great for fine work in balsa. Just set up a larger version of a jewelers bench pin and you are good to go. The noise level is great also.

If you are talking about cutting sticks, a small band saw is your best bet. Set it up with a rip fence and away you go. You will loose a lot of wood in the process though and to get a fine finish you will have to sand the sticks down. For very thin, 1/8" or less sticks the balsa slicers with an Xacto blade do a very good job with no waste.

Don