Can we change how Sexlab opnes Mouth?

[Nymra]

So in SLAL Json I can control when to open the Mouth.

But how can I change how that is done?

Is it a Script?

I suppose Sexlab just adds a phoneme (Big AAAH) or something from MFG Console. 

I tried to add custom "Mouth Open" via Sexlab Util1 but it is overwritten all the time after a second or too. 

This is an expression from:

mfg phoneme
1 100
2 100
11 100
5 100
10 100 

So 5 added together. Is it possible to command sexlab to do this when JSON says "Open Mouth"?