I am trying to narrow down what string gets the closest to Mccartney's actual Rickenbacker tone. I use TI JF334 flats on my Rick 4003s with push pull vintage pot and can get quite close to his tone but I find there is so much confusion on what strings he actual used on his ric. Is there a better string then TI JF344 for McCartney tone and what did he actual use on the Rickenbacker? Thanks for the help!