Na, I have that Currell book...but its in storage..I'll dig it out thanks.And thanks Krafty...that article will help some. Na, the technique for the vent dummy will work with a few minor modifications..thank you both for your help

No problems - hope it helps!

Yes the vent figure diagram could be useful. The big difference is that instead of running the control string down you run it up. I will say that you have to be careful using springs and such inside of marionette heads. If you get something to tight and it takes to much pull to open the mouth then the entire head moves with each mouth open.  Same on the eyes if you use any type of springs to hold them in neutral.  Very small springs with very little tension are the best, or in the case of the mouth you can counter weight it so that it always stays closed.

Ok, that's good to know. I guess I need to learn more about marionette controls

This place is so useful