heavy string gauge

I've got a Custom 22 with the first gen locking tuners. Need to tune down to B standard for a project and got a set of Ernie Ball Cobalt 12-56. I can't get the tuner to grip the lowest string however. What are the thickest string that are usable with those tuners? Any tricks to use?

Hi all, I have a '04 PRS Custom 24. I have always used 10-46 D'Addario strings but recently I wanted some more tension on the low E so I am trying the 10-52 D'Addario light top/heavy bottom set. I was a little surprised by just how much more tension these strings have. There was quite a bit...

Hi, I'm thinking about using 12's (Ernie Ball Not Even Slinky 12-56) on my PRS Tremonti Custom SE. I'd like to know if anyone has tried to do this, if so, what kind of changes have you had to make to accommodate such a heavy gauge, what changes do you recommend? - Billy