Keep the BT2 - nah, it doesn't magically mute the rest of the band, but it does slow things down, change key, etc., and can function as a headphone practice 'amp' for late nights. I don't consider it cheating to use the Bass Tabs White Pages or any other professionally transcribed charts - just paying someone else for the time they spend going over & over the track transposing. (Though once you've figured something out it is funny to see what some professional transcriber thinks as well...)