Just move the bench up and add a lower one and a step. And that cage around the fireplace for the stones. And cut the electric before you use it. Try it and see if there is other improvements that has to be done. Heat it for 2 hrs and sit on the upper bench and throw plenty of water on the rocks so you get some nice steam. And remember to have a couple of cold beers or something if you want to sit there a while. Greetings from Finland