Frank used two main SGs during the 1970s: an SG with a black full-body pickguard and stripped headstock nicknamed ‘Roxy’, and a walnut mongrel nicknamed ‘Baby Snakes’.

Both were heavily modified; Baby Snakes had a non-Gibson neck, a built-in preamp, coil taps, phase selectors, and an onboard Dan Armstrong Green Ringer fuzz/octaver. At one point he used 0.007-gauge E strings and an incredibly low action.

Listen: Baby Snakes (1977)