I'm going to try combining the HG 1/100 G-Falcon I made last time with the MG Gundam Double X, which is also 1/100 scale.
With the old HG Double X, I had to remove some of the armor on the back and waist, but with the MG, you just slide and unfold the armor to reveal the connection holes.
Incidentally, this gimmick is a hidden gimmick that isn't mentioned in the MG instruction manual.
The G-Falcon Double X, a combination of the MG and the old HG, is complete!
Thanks to the G-Falcon's propellant tanks, it effectively becomes a four-legged machine, making it more stable when standing than the MG Double X alone.

MG Gundam Double X + HG G-Falcon Unit | TOKO(ガンダムX30周年)'s Gunpla works