>I am thinking of filling them with wax....comments anyone???? Mark, that is exactly the way it's done on the Flying Squirrel (aka, "KR Construction Trainer"). You can either light a candle and let it melt/drip into a screw hole if that's convenient, or else just scrape some up and stuff it into the hole and tamp it in firmly with the end of a matchstick. Whatever the case, it comes right out later with a slightly undersized drill bit or what-have-you.
If you'll be glassing over the nutplate area and need a locator to help "find" the covered-up nutplate, stick a matchstick or toothpick in the hole after the wax is in and leave a nub sticking out as you glass over. You can drill out the stick and the wax after the glass hardens. Be real careful with wax though... just put it in the nutplate holes and don't get carried away. Epoxy and flox will not stick to it, nor will many other adhesives or fillers. Oscar Zuniga San Antonio, TX