When I got my RCA kit the neck or neck pocket was cut on the slant making it impossible to get a low enough playable action without creating a rout in the body. I thought it may have been just me but Ive spoken to a couple of people whove had the same issue. Dont get me wrong, once it was adapted it is a fantastic bass - i dont know if this is a factory calibration issue or if they are dedigned to be that "out"