I had some black duct tape that seemed thicker than the grey stuff, and ran 4 layers lengthwise with a layer of clear packing tape which worked well for a release. I made it longer and wider than needed, then after measuring snapped chalk lines and cut it before installing with a dremel and small metal cutting wheel. I then epoxied it in before adding wood edges. In this case of glueing I precoated both surfaces with plain epoxy, then added a little thickening agent to insure a complete bond. In my case the sticks at all the edges may be a little over done, something a little smaller might be better. They just have to be nice and straight and in plane with the wing surface, and strong enough to carry fabric loads. The thickening agent I used is west system number 403 micro fibers.
