I assume that the manufacturer would check to see if the neck had a hump in it. As you know when you have a hump you're screwed. After I put all the work into finishing this guitar. Finally had a chance to set it up. I determine the neck as a hump. I missed my return date by a couple of days. If this seller would be so kind? Just to send me a new neck I would be very happy. Otherwise it was fun and everything else fit perfectly. But as everyone knows the neck is extremely important. You can replace electronics easier than straightening the neck. I guess it's just live and learn. Now it's going to be a decorative piece for the wall. After exhausting research I have found the trust rod can also take the hump out of the neck. Only some guitars where the truss rod can be turned the opposite way. Once it has loosened up you can tighten it again the other way to pull the neck straight. It does have a few high frets that need to be file down some. Otherwise I do believe it is salvageable now.