The Kauffman vibrola was not an ideal tremelo system and was well known for not holding pitch with even moderate use. It was also an ungainly looking device. Buy Rickenbacker It's no surprise that John decided to get rid of it when he returned to Liverpool. Guitarist Chris Huston of fellow Liverpudlian band 'The Undertakers' had a factory-fitted Bigsby vibrato unit on the Gibson guitar he used in 1960, which Huston clearly remembers today as "the first Bigsby in Liverpool." He recalls: "John and I were pretty good friends, and not long after he came back with the Rickenbacker we went into Hessy's music store in Liverpool, and he bought a Bigsby unit from salesman Jim Gretty. John had his guitar with him, and we put it on the counter, unscrewed the old vibrato, which obviously wasn't as good, and screwed on the Bigsby. When John and I started to work on his guitar, right there on the counter, Jim said, in his thick Liverpool accent, "So, yer gonna put it on 'ere, are yer?". The bridge came with the Bigsby unit. The whole operation went without a hitch.'
Several sets of knobs are known to have been used on Lennon's 325. At the same time that the Bigsby accessories were installed another set of knobs was fitted. They were silver dome-topped, cream coloured radio/tv knobs, possibly Philips brand, and came from a TV/Hi-Fi store, on Whitechapel, just around the corner from Hessy's. After the refinish to black John settled on a set of Burns type plain aluminium knobs. These remain on the guitar to this day.