I grew up on a 4001, my first good bass, bought at age 15 in the 70's. I played only that for a decade in my original rock and new wave bands before trying anything else. I didn't even really know what other basses felt like. Once I started working pro and doing lots of recording, I gravitated towards FSO's for all the usual reasons. But I'd love to have another Ricky one day though, even if I don't have a particular need for it - nothing else sounds like them.