Well, this can be said to be my biggest gunpla project so far for the year. The idea first came from the 00 Gundam dual GN Drive design and a bit of my desire to beef up Astraea. Not much of a scratchbuilder at all so I found myself staring at the picture of 00 Gundam time to time. Then it struck me to finally make use of that extra Strike Noir. Bought another Exia (totalling to 4). Then with the parts and a bit of plaplate, the Pack is made.
The Twin Drive Pack is compatible with Exia too and partially compatible with Strike Noir and WeissStahl.