Did this right after the release of "Scooby-Doo! Abracadabra-Doo!".  The idea of Madelyn Dinkley appealed to me.  So did the idea of Madelyn and Velma sharing a little bound time together.  In retrospect, I was so busy trying to make sure Madelyn's face was on model that I let the exaggerated length of her thighs get by.