This was one of my favorite builds. I didn’t go off of anyone’s instructions you can find online. I Didn’t research how other people did theirs.
I just did it.
When I was ready to build I text the wife to verify how tall she was. I built the coffin around her size. She wasn’t exactly thrilled.
First year I built this it was a static prop With some lights on the inside so you could see it at night (Plus I’m obsessed with lights). The next year when I started getting into motors I added one that opened and closed the lid. Then connected it to my smart home so I could control when it did it.