Re: Neck Bow Back.
Sometimes necks that seem to have excessive back bow when not under tension straighten out once they are strung up. So, if you haven't seen the neck with string tension applied, don't assume the neck will be bad.
If, on the other hand, you have had the neck under tension and still can't get rid of the back bow by loosening the truss rod, you have a problem that you can waste a lot of time trying to fix. You will probably get a bunch of advice here on how to "fix" a back bowed neck. Sometimes they work, sometimes they don't. Sometimes the "fix" will fail after a certain period of time.