For the record, and to solidify the process in my own mind, here is how you can precisely derive the deltaAddDelta values for JCMs that you wish to hold back.

Suppose that a Joint Controlled Morph was originally designed to be at full effect when the x rotation reaches 145 on the parameter dial, but you don’t want it to take effect until a prior JCM designed at 90 is 100% active. Subtract 90 from 145. There is a range of 55 for the second morph to load (between 90 and 145.) 1/55 = 0.0181818. This will be the first deltaAddDelta value for the JCM. You will now need to hold this JCM back until the first JCM reaches full force at 90 degrees. The negative value in the “One” section can be found precisely by dividing 145 by 90.  -1.611111 is entered in the second deltaAddDelta channel that is slaved to “One.”

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