Here is another closeup of the section Marco pointed out as a possible problem - it looks good from this angle.

Do models need to be as perfect for woodworking as they do for rendering? It may even be counterproductive - guitar necks (and bodies) have to be scraped and or sanded and then finished - the finish will have to be wet sanded and buffed - so a few tiny creases or bumps should not be a problem if the model is essentially correct. That said, will continue to strive for the best surfaces possible.