I'm in the process of planning new doors for our kitchen cabinets and have a question for you guys. They're going to be very simple in design, just using tongue & groove to join the rails and stiles (3/4" thick), and inserting a 1/4" panel of cherry plywood. Regarding cutting the dado for the panel, am I going to have to use one of those special undersized router bits, and how deep do I need to go (I plan on using those space balls if that's appropriate in this instance)? Or is there another way of accomplishing this that would work even better?? Any assistance would be greatly appreciated. Thanks!