In my youth I was fortunate enough to purchase a used Rickenbacker 4001. Being quite naive, I promptly strung it with roundwounds, played the hell out of it, and let the local shop do all of the neck adjustments. The neck eventually developed cracks running parallel to the fret board, apparently from the rods pushing against it. After I learned the cause of this problem, I quite playing the instrument, and it has sat since. Now the reason for my post: is this repairable (to the best of your knowledge given my basic description), and how much am I looking at spending? Your thoughts are appreciated.