So I've heard varying rumors on using 9s on the EBJPMM. Some say it won't work well, some say it doesn't matter. I heard that John Petrucci was using 9s at a recent clinic and that he has switched to these exclusively. So what's the deal with putting them on the EBJPM? Is there anything special that needs to be done with the springs or anything else? What are the steps one would need to take to ensure that everything was setup correctly when making this type of switch?
