i modded one of my two lovely rickenfakers a few days ago with a 2400 kahler bass trem.
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first of all: a tremsystem (regardless if it´s on guitar or on bass) is more an additional gimmick/tool for expressional playing.
remember: first of all the bass is a rhythm instrument.
but i´ve got enuff space and ideas where i can really use the whammy. but just like all other guitarplayers: not ALL the time.
but for my case i´d say: the bridge itself increased the allover sound of that faker a LOT!! i recognize now much more brightness and punch.
for sure i had to replace the cheapo stock plastic nut with one of that fantastic graph-tec nuts.
i raped my trem the last few days like hell, and my bass is still in tune!