The oldest guitar that Bartock braves the road with on this tour is a limited-edition 1971 reissue of a Gibson 1955 Les Paul Custom—complete with original “staple” pickup in the neck position—that he uses for three Zep tunes in each night’s encore.

Premier Guitar’s Shawn Hammond met with Ann and Nancy Wilson’s guitar tech, Jeff Ousley, lead guitarist Craig Bartock, and bassist Dan Rothchild before Heart’s show at the U.S. Cellular Center in Cedar Rapids, Iowa, on March 21, 2015. Ousley—who’s been maintaining the Wilson sisters’ gear (and making them mean cups of coffee) for more than 20 years—walked us through everything from Ann’s custom Martin acoustics to Nancy’s vintage SG and Tele, while Bartock and Rothchild shared their cool customized instruments.