DIY ATO Setup

I'm looking to put in an ATO system for my 29g Biocube. I've seen A LOT of DIY's all over the internet. Does anyone have a reliable favorite? Just trying to see what everyone is running DIY wise and what you think of it.
I'm trying to save a little money by going DIY.

I plan on putting it in my stand on the very bottom shelf in the back.
 
Hi does it have a sump? it makes a big difference on the ato installation.
I run a double float switch with a tom's pump cheap and fairly reliable
Joe
 
I used a version of this one:

http://www.melevsreef.com/plumbing/auto_topoff.html

I did upgrade the electrical connection to a solder connection with heat shrink. I also used a different rubber maid container for my reservoir. But the basics principles and parts are the same.
 
Ok, cool. The link on Marc's site to aquahub was the one I was leaning towards. I got me a little 1.5g hex today with a lid for free. It has a hole I can run my power cord and tubing through so I might start off with this and see how it goes.

Thanks for the advice!
 
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