The GCX does add a lot of weight to the rack since the pedals have to be close to the system, usually in the rack itself. I like mine for many more reasons than the extra weight can justify not using it. I got a Rock n Roller from GC and it makes travel soooo easy now, weight really doesn't matter anymore to me. It rolls over rocks and grass in one trip! Highly recommended if you hate moving heavy speaker cabs. It folds up easy and packs away easy and is very light for its size.
As always, you have a cool rig... would like to see the new one!