Cage, good point about the grouping! And I agree that it's probably best to keep the JCM dials hidden by default. It's just that sometimes people complain (not to me, so far, but I've heard the general sentiment) about too many things being hidden in figures, which is why I asked.

Yes, this modification will hopefully solve your vanishing ERC problem.

-- I'm not mad at you, just Westphalian.