The dry wall certainly isn't bad. But I have gotten to the point that I rarely build anything flat on a board anymore. Wings are done on a jig made of two pieces of 3/8 inch aircraft tubing held at the ends by aluminum blocks. The ribs are stacked and jig holes drilled with sharpened brass tubing. You can fully finish a wing panel except for the wingtips before pulling the rods. Fuselages are built using a jig like the one I referenced in a post above. Jigs are the only way to build airframes that are genuinely straight and square, and sometimes even that isn't guaranteed!

Here are a couple of interesting links for some photos of building jigs:

http://www.clstunt.com/cgi-bin/dcfor...rum=DCForumID1

And this one is a real killer wing jig description (The guy in the photos is Richard Oliver of Ro-Jett engine fame:

http://www.clstunt.com/htdocs/dcforu...mID1/6421.html