It’s not the best guitar, but I bought it in the 1960s… I was very much into Jimi Hendrix and that kind of thing. According to Mayall, McCartney saw it, liked the tone, and went out to get his own. McCartney is absolutely sincere when he says Hendrix and “that kind of thing” inspired him to chase feedback. Whether nudged by Mayall, Hendrix, or pure accident, McCartney made the Casino his own. Hendrix may not have sold him the guitar, but spiritually, he’s there in every howl of feedback that came from it.