Playing against type, the idea was to have the girl of the group be the "grease monkey". Inspiration for Gadgets hair style and costume came from a petite story-board artist at Disney TVA with blond hair and bangs who wore a lavender jumpsuit to work on occasion. Gadget turned out to be a very popular character in spite of her ghastly last name -- Hackwrench. Yikes!
In case you missed it. Monterey Jack and Zipper model sheets were in my Aug. 16th post. Check 'em out.