Emailed Grant couple days ago.

I actually built a few sensors using conductive foam before I stumbled upon the saran wrap solution (which yields a smaller sensor, costs less, and is easier to build). We sandwiched about 6-8 layers of saran wrap with copper wire bent back and forth to form a square of copper about 1 cm^2. The resistance between the wires drops about 5 orders of magnitude (from about a MOhm to about 10 Ohm) when you step on it. This is quite a hack job and probably not the most reliable solution, but it is dirt cheap.

Best of luck. Your cables look amazing, by the way.

- Grant

My test sensor was just using a wire, betting the increased surface area of a grid will make it actually ... you know ... work. Now that I have foam, may try both with a grid. I need to get finer wire however. Looks like a trip to radio shack for me on the way home. Now only if they didn't have such retarded employees.