OK to start off I am going to be using the 100g rubber maid and 3 drawers as a DIY.
I have drilled out the bottoms of the three drawers, which was some trial and error of how big to drill the holes. I drilled the holes in a grid pattern, I am using Chomper's design. I filled up the rubber maid and ran the pump back to the top of the drawers and got the water flowing thru the drawers.
I have 2 1 1/2" holes drilled in the overflow. I was also thinking of drilling a 1 1/2" hole near the bottom for water changes and to drain in the the filter while I am there watching so if power goes out there will not be a complete drain of the tank.
I was thinking of having 4 returns (2 at each end) 1".
The tank will house a RTC (5" right now) and his tank mates (don't have any for him yet).
Oh I bet you are wondering about the pump, I have a spare pump for my pond that I am planning on using. It pumps out 3600gph
.

I have drilled out the bottoms of the three drawers, which was some trial and error of how big to drill the holes. I drilled the holes in a grid pattern, I am using Chomper's design. I filled up the rubber maid and ran the pump back to the top of the drawers and got the water flowing thru the drawers.
I have 2 1 1/2" holes drilled in the overflow. I was also thinking of drilling a 1 1/2" hole near the bottom for water changes and to drain in the the filter while I am there watching so if power goes out there will not be a complete drain of the tank.
I was thinking of having 4 returns (2 at each end) 1".
The tank will house a RTC (5" right now) and his tank mates (don't have any for him yet).
Oh I bet you are wondering about the pump, I have a spare pump for my pond that I am planning on using. It pumps out 3600gph
. 

?
Pharaoh, the only place's I know around Indy is the Reef and UB's. I tend to stay away from UB's, but I do go in once in awhile. I love the Reef and will get my bulkhead fittings from there. Are there any other place's here in Indy???