On the entire 'Net, I've managed to find one GP5 tab for "Rumble" that has a bassline, but it doesn't sound at all like all the "walkin' around" that's going on in the song. I think there's also one text tab by a guy who thought the Ventures performed it. That one looked to be "short a few notes," too. It seems like it would be pretty straightforward, but I can't figure it out. The guitar parts are great, but it just ain't the same without that bassline. Thanks. -- Doug C.