“Hmmm, let’s see now...the ’57 Gretsch or the ’58 Goldtop?” Joe Walsh contemplates a bevy of highly collectible vintage guitars strewn in open cases across the floor of a Hollywood photo studio. Broad shouldered and looking fit, he towers over the instruments, meditatively stroking his chin. A Guitar World cover shoot is serious business, and Walsh brings to it consummate professionalism that has guided him through over four and a half decades as a classic-rock guitar legend.