Finally I finished building all 3 of them.
I mean the SxDxG Gundam. I need to get 3 boxes of them so that I can build the 3 different variations of them. Good marketing by Bandai actually. There's not much difference between them actually except for the difference in weapons. Next I would try to combine them into The Snibal-Drago-Gira which is a wingless, three-headed, dragon-like mecha. Cool.