Okay, I have an Music Man Bongo 4. Its a great bass and all, but here's the problem. The action is getting higher, and the strings seem to be gradually moving closer to one another, but maybe it just looks like that because of the high action. Anyways, I am a complete n00b at truss rod adjustment and such, so I have a few questions about fixing the action: Should I get somebody at Guitar Center/Sam Ash to fix it? In addition to the previous question, Does it cost money for them to fix it? If so, typically, how much? Is it difficult to adjust the action?