I ended up taking the XL dimensions for the width and used the standard dimensions for the height & length. The plans and videos were excellent. Joe also quickly responded to my emails.
It took me a little longer to make this as I had a hard time sourcing material but ended up finding red cedar on marketplace. This changed the dimensions and measurements, but everything turned out great. This also increased the cost by a couple hundred, but I like the red cedar and the thickness of the boards.
When complete, the unit is heavy. I like the fact that we can take it apart for moving if needed. I’m a fan of the sauna and use it daily. Don’t hesitate to buy this and start building!