On basses where I consistently use both pups to get the tone I want I've installed a stacked Vol/Vol pot. Once you get the neck and bridge volumes where you want them you can just grasp both the top and bottom knobs together to increase or decrease the overall volume much like a master volume knob would work. On a TBird that would free up a pot hole for a kill switch or pickup selector or coil tap switch (or as @kat888 would do, install a star shaped sticker).I Find the same thing. It's annoying having to adjust both volumes every time. Someone told me that wiring them (Birds) up like a jazz bass would solve this. How else would you wire a 2 pickup, vol, vol, tone configuration? I can't think of many other ways.

