i was planning on using 2*4's screwed into the outer frame (over top). 4 of them. It will all be behind a wall in a seperate room so looks aren't as important. Wood will all be coated in Kilz (sp?) bathroom primer paint to help with the moisture from humidity on the outside areas of tank, stand.
There are alot of imperfections in the plywood I got, small dings in the finished side. I cut it to size (bottom piece) then added putty to any dings, sanded, putty, sanded, putty and will sand 1 last time later tonight. It will be a long process but I like the work.
I will start a new thread when I get a little further along with the pictures I'm taking, and how I'm doing stuff.