Yeah, absolute bummer on the DIG Controller. I tried to get one through HD's website, but they don't have it(or at least didn't) on the website. I should have had a buddy buy one for me and mail it, would've saved me $30.
Yeah, you should have.
So far, I only need to have 2 relays on at one time, but that includes a light/co2 piggy back. I may have to pull the co2 off and put it on an outlet timer(I see that you ended up having to do that too).
Exactly... If you have more than one bank of lights, and need (or want) to run CO2 independently from that, that's when you run into that problem.