I'm currently modifying an SDEX Standard Astray.
Initially, I was only planning to modify the body shape (to a cute, old-fashioned style), but I decided to make it as an original model.
The arm is scratch-made using putty from a BB Senshi 50 Musha Plus core. I was planning to make the left arm first, and then do the same with the right arm. However, the Musha Plus arm still had a good shape, and I felt it would be a shame to hide it, so I decided to use the right arm as it is. This is the reason I changed my plan to make it an original model. (It's not because it would have been too much trouble to make the right arm in the same way...)
Because of the arm issue, I decided to make the left arm.

Modifying SDEX Standard Astray ② | クラフト's Gunpla works