I've attached an image of the wing configuration for the F-16.

Bob Fiorenze and Larry Wolfe have both used leading edge flaps with success on their models. In Bob Fiorenze's case (on a Yellow Aircraft F-18) the leading and trailing edge flaps were operated by one servo in each wing.

Larry Wolfe's method for building the leading edge flaps is to have a "leading edge within a leading edge". He will send you the info, or you can find it in one of the Model Airplane News "400 tips" books.

I've created a set of pages, including many contributions by RCU readers, specifically devoted to flaps, slats, and leading edge flaps. You can find it at http://homepage.mac.com/mikejames/rc...ite/index.html

Hope this helps.