Agreed, the styrofoam was an issue with any type of stress but I found that using acrylic caulking as “glue” and bonding pieces of wood works very well. For this one I have 8 foot 1x2s with a single bead of caulking along any edge that will touch the foam. I then either weight it a little of use masking tape to hold it over night. I can then screw things to the foam through or in the back. I’ll take some pictures to show how I built it. This one did worry me a bit due to the span it had to cover and the, though rather light, weight of the plastic chain. However, I am very pleased with it as I had it up there was a pretty windy day and it held very well as a test. I used this procedure to anchor the castle as well. Also works Great for tombstones.That is such a great looking prop. What I'm amazed by is that the Styrofoam is holding up. We use Styrofoam for a great deal of our props, but the one thing we don't use it for is anywhere that it has to hold up to stress. If it's a tombstone or wall just sitting there, we're good to go, but if there's movement to the prop, we opt for something sturdier. How is the foam holding up to the actual running of your machine?
I'll look forward to the pictures. It does sound as if it could be a very handy approach to strengthening much of our foam based props.Agreed, the styrofoam was an issue with any type of stress but I found that using acrylic caulking as “glue” and bonding pieces of wood works very well. I’ll take some pictures to show how I built it.