Building a full Setup...Part 1

I'm getting ready to build a sump for my tank and just happened upon this thread. I've got to use a CPR overflow box, the CS100 should be fine for my 90 gal tank. I've got a RIO 3100 pump I want to use and build the sump from a 20 gal. long. I guess this will do the job until I decide on a different pump. And design suggestions?

I hope to paint the back glass of the tank today, maybe a dark blue would look good.
 
very nice setup and DIY project..
 
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