I have been using a similar type for 3 years. While it is a bit cramped with 2 keggles it still works like a champ. I am considering lowering mine somehow but haven't figured out how I wanna do it.
Remember to post pics of it in action if you get it.
North Doyle Brewing
Carboy 1: Chico's Pale Ale
Carboy 2: Racer 5 Clone