That is one terrific prop ScareFX! I think your how-to is great also. The content is well written and you provide a lot of pictures. That helps me more than the content does...I always seem to learn more by studying the pics.
You couldn't have picked a better time to post this how-to as I've been looking for some plans for a cauldron. I think yours is the best I've seen so now I'm on the lookout for a plastic drum
I just started the witches head two days ago with plans for her to be static...I may have to reconsider since seeing your awesome prop in action. Congrats on a fantastic prop! (and a cool website too)