I've thought long and hard about this (Peter Griffin laughs in the background). I think I am going to go with an ebb and flow using hydroton and a bottom reservoir.
The RDWC UC would be so cool to build and see it work, but I think, after the initial excitement wore off, I would be stuck with this beast of a grow to maintain. Not to mention power, water, and time consumption. I think a fill and drain is going to be much easier, cheaper, and a ton less work to build and maintain.
So I'll probably start a new thread today after I modify my design. If any noobs out there want me to go over the DWC, in detail, for their own projects, I certainly will. RDWC UC is a bad-ass system, and the yields would be scratching at the ceiling for the amount you can get out of a plant. DWC has always been my favorite system and I always had great yields.
The couple pics I posted of my original grow were RDWC.
Anyways, I'll work on a new thread today...if anyone really cares (LOL)
Peace