Quote - This one seems a bit trickier than the others, because the morph moves with the jaw and the jaw moves with the morph.

It only looks that way. The MouthOpen channel in head is just a proxy for the jaw rotation. It has no deltas. The real morph is JCM-MouthOpen in head, jawLower and tongue1.

So the control flow is something like this:

head/MouthOpen -> jawLawer/xrot -> BODY/JCM-MouthOpen -> head/JCM-MouthOpen

There is no circular dependency or two-way linking, just multiple levels of slaving. The channel in the body is the one you should multiply your switch value into. I did a quick test of the set-up a little while ago and it worked nicely. If you want, I can post a snipped of the modified cr2, but there's really nothing to it.

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