Re: Well theres this Gibson on ebay and....
Cover's no big deal, you can find one anywhere. The cover has nothing do do whatsoever with the truss rod itself, it's just for looks, it'll play just fine with or without one. As far as adjusting the truss rod itself, the basic rule is only go a little at a time, and never force a really sticky one. Tightening the nut will straighten the neck, and loosening will cause it to bow, like a bow and arrow. Overtightening will cause the neck to bend backwards.