I made a Cauldron Creep in 2016, my first attempt and it turned out well however the whole unit just kept moving some much and eventually the whole thing would tip over. I want to use it again for this year as it was such a hit but I don't want the whole thing to tip over again. I just want the arms and head to move as its supposed to. I had the motor on the slowest speed. Not sure if the stick was too heavy? Any hints or tips that I could do please?