You better lava me now or lava me not 

I hadn’t really thought through the logistics of the lava layer. I lined the box with plastic wrap and then cut a piece of waxed freezer paper to fit. So far it’s keeping things stable enough to move, so hopefully it bakes OK. I still have a lot of texturing to do, but the first layer is down. Unfortunately, the clay is brittle AF and I dumped my pasta roller in the move; I have regrets.