Craig,
Small edits to the scan data are easy to do. It is adding editable features to a CAD program that really takes time. You certainly can scale items up once you have an editable feature in order to compensate for shrinkage if you wanted to make a mold. Options are endless. The trick will be cranking out a usable product at a reasonable price.
Steve
Sounds like the 4-function calculator, circa 1975: already getting use and coming down in price, but not yet commodified. Give it 10 years and this will be everywhere for making custom parts, and the price will have come way down.
