I wanted a transformable SD Zeta Gundam, so I created one by mixing SDCS and HGUC parts.
I tried to make it look as natural as possible in both MS and WR forms.
MS form. The head and legs are from SDCS, and the rest are from old and new HGUC. The arms, shield, rifle, and hyper mega launcher were too long for an SD, so I shortened them little by little. Initially, I was aiming for a proportion similar to Super Robot Wars, but the proportions got a little longer as I incorporated articulation for transformation. But I think it turned out pretty well. I also made the mega launcher. It's a big weapon and the arms are short.

[Transformable] SD Zeta Gundam | かっこ's Gunpla works