Oh BOY! It's just coming along wonderfully!
I think I might have skimped on the hydroton pebbles!
I added a couple of frozen Gatorade bottles to mine. . .your idea. .. and it did help to drop the temps.
Gonna run go see what your masd's will look like!
Masd. schroedenana
Masd. rolfeana
Edited to add: Wonder where I could get some of the BLACK egg crate panels?
I got the white stuff at Home Depot in the lighting section.