Dweezil uses an SG from the Gibson Custom Shop which is a replica of Frank’s infamous “Roxy” SG (used on the Apostrophe & Roxy albums). The guitar features two toggle switches—the first changes the Gibson Custom Shop PAFs from humbucking to single coil, the second allows out of phase. Dweezil also had a piezo pickup installed at the bridge, making this guitar singlehandedly capable of almost any sound—a necessary feature when playing the complex compositions of Frank Zappa!
Dweezil also takes a Fender Strat to the show, a Custom Shop guitar built by master builder Alex Perez. Not only does it have a picture of Frank on the upper bout (!), but the neck is a replica of a guitar neck that Frank once had on The Hendrix Strat (Zappa famously owned a strat that Hendrix set on fire). The guitar has Fender Eric Johnson single coils in it and Zappa purposefully has the pickguard customized to look like a part of it snapped off—a look he first saw on a guitar Jeff Beck was playing.