[Ibycan7]

I just have a question. why do you want to tune your guitar to B? to tell you the truth my guess is that the guitar is going to play like crap wheather you have 13 or 12 in there. those guitars are not designed to play that low because of the scale size of the neck. that's why there are baritone guitar. I'm not trying to put down what you are doing but the more information you give us, the better we can help.