Hi Rich, I bet you are glad to see me in a low action / JS series chat.
But the thing I was going to add is that, the JS series, unlike the JEM , has medium or smaller frets. *This allows a little less room between the crown and the fretboard, so if the action is low, it is kinda hard to get a grip on the string.
I prefer the larger frets, and, of course, the lowest action possible. *
Have a nice one.