Well I got some extra light Curt mangans for my Geddy Lee Jazz bass a month ago. Its a great string, but the top string buzzes like no tomorrow. This is partly because the nickelwound extra light is so flexible. My issue, if I get this set up to a proper string height, do they have to mess with the truss rod? Why do I ask this nonsense question, because the truss rod on the GL is not on the head, but rather hidden under the pickguard. That might mean that the process could take more a while to fix at the shop, then im stuck waiting a week to get it back. Can I just get the saddle adjusted by any chance? Thx alot guys, im really frustrated because alot of my favorite songs are in drop d tuning, and the loose string buzzes like no tomorrow.