Well recently i stumbeled upon a great deal. For 625 dollars i could get my hands on a rare pink mark hoppus bass with strap locks, strap, and gig bag. This bass is like i said extremely rare and a amazing deal, but i only ahve one problem. The bass doesnt have a tone knob and i am playing everything from punk to jazz. I definitly need a wide variety of tone so there for i want to put in a tone knob. I will not do this on my own beacause i know i dont trust myself. Has anyone out there got a tone knob put in from guitar center. If so can you please tell me how much this operation would cost??? Thanks.