so i am going to jump into/hijack this thread. I am planing on a 180 myself, have build several stands based on R.E.'s design with 2x4's for 55 gallon tanks. so with the 180 i want to take sheets of plywood and rip them down to strips that are wide enough for the proper support. I was thinking about getting 3/4" plywood and doubling up the strips for a 1.5" board. is it necessary to double it up? having read this thread i will make the top frame 8" wide.