Oh, have you found that one thread abt basic blucky animation? Cut the nub off the top of the spine, put a servo flush with the top of the spine, tie-wrap pulled tight around the outside of the spine to secure it in place(or a drop or two of hot-glue). I slit the back of the skull slightly to fit one of the arms of the red 4-arm servo arm inside, hot-glued/screw the other 3 arms to the outside of the base of the skull, put the skull on the servo, fired up VSA and it can swing back and forth..
the pix are mine, the video is from Bob & Cindy's Halloween pages
from Bob & Cindy's Halloween Pages
TJ