Tom, Tim,
The glue-stick from stationary stores is the sticking method I have used for years. Order a second set of plans and cut them up for templates. Glue stick the paper cutouts to the balsa and cut around that. If you cut out the part relatively quickly the paper will peel off the balsa very easily. In other words, don't let it go overnight. It will be well adhered! I've made ribs and formers from this method for years. Also have used the pin through the plans for things like tail surfaces, fuselage sides. That is a great method, too, for those kind of parts. For punching the jig holes in the ribs, we use a length (4-6") of arrow shaft (the correct size, obviously) which is sharpened on the end and a hardwood ball on the other end. The hardwood ball is obvious. This punches cleanly through both the paper rib template and the balsa rib material. Make the sharp end with an RCBS neck champfering tool. Ammunition reloading supplies, there. After the first rib is made, use it as a template to make the second rib. That way, they will be a very close to exact match.
Of course as a crass commercial message, you can always get the ribs cut by your friendly laser cutter.
Pat Johnston
Templates and Cutting Studio
Skunk Works