Very nice indeed! Good work with all that! I see you also took the Scythe Ultra Kaze fans. They really are the best choice.
What I would suggest is try getting some mini heatsinks to glue them on the outside and see if that drops the temps. In your case they should drop them more than they do in open case versions. On my first miner, which came without external heatsinks, I used these:
www.ebay.com/itm/171764372281. Glued them on with this thermal adhesive:
http://www.ebay.com/itm/111172816819I got a price of $30.00 for 60 heatsinks, so if you're buying them, make sure you click "Make offer" instead of just buying them at stated price.
I would definitely prefer to have acrylic side panels on my miners. You have me a very nice idea.
