So i never received my wrench thanks to a ripped envelope by the USPS. so i was forced to take the neck off to adjust the neck. While in there i decided to put a shime in to pocket to help avoid the shifting some have had with these basses. I always use a mesh like (sanding for sheetrock stuff) textured peice. put it back together. neck does n't even think of moving when tugged on and angle back has made the action really swwet. very close to my high end 5 string basses. FWIW i would recommend this to anyone on the fence with the neck onthis bass. J pups are rather weak bt bass sounds pretty niv=ce.