U Can Do 3D
The Iron Bay regulator looks pretty sweet, however I have not heard of the company nor have I heard of how well they work. I use the cline on mine with a Saito 100 and it works perfectly.
As for the guy who said that all UCD's build tail heavy I'd strongly have to disagree. I have never seen a UCD build tailheavy. It seems like almost everyone that builds one has to fiddle around getting the CG back toward 6". That is the reason that a ton of people move the tank to the CG.
BTW, let us know how that Ironbay regulator works? It's 33% cheaper than the cline so it might be a great option. Of course the support from Jim Cline is worth paying a bit more for the product.