Back for an update. How are y'all? Missed yous guys.

Here is how the back wall shaped up.





In the end I went ahead with a modified fractal design from Arqen (A1-LF). I used foamular EPS insulation from home depot and made a hot wire foam cutter to dice it up. This made the project affordable and not weigh a ton. The slices are glued together with 3M super 77 spray adhesive. Wow what a time saver. Had to wear gloves, specs and a mask though. Almost as intense as the spray foam day!



Mocked up before gluing on hot wire bench.



Spraying.


Pretty happy with the way it turned out. Building the hot wire foam cutter was fun too. Now to see how it all sounds....