Ski, I cured the waving problem by laminating all decks to 0.5 mil cardboard (my favorite source is Coke cartons). I even go so far as to back the superstructure bulkheads with cardboard as well, even in 400 scale. In order to maintain proper fit, you sometimes have to trim down the framework to compensate for the extra thickness of the deck; however, since I don't care for the system JSC typically uses for framework, most of the time I wind up designing my own eggcrate framing and work the extra deck thickness into my framework design. On a few models I've built, I've even laminated the hull sides, which takes care of the starved puppy look as well.