So I pick up and put together RCA-4 first time building on. I got a lot of fret buzz on the 2nd and 3rd string from the 1st to 3rd fret, tried my best to get rid of the buzz and nothing help. I took the bass to a local music shop that has done some work on other bass of mine. They told me the neck was badly back bowed and the trust rod was floating in the neck. Is there any fix to this? would I have to take the neck off? thanks for the help ben