Assuming you're using MDF for the enclosure, you could try these screws made specifically for Melamine and MDF, much more resistant to pull-outs: http://www.mcfeelys.com/subcat.asp?subcat=20.1.1.1 Or , as suggested, the T-nut: http://www.mcfeelys.com/subcat.asp?subcat=20.16.1 Dry wall screws are handy, but way overused in wood products which they were never designed for. We build furniture and really like the McFeely's square drive screws over slot and Philips head screws.