Alright guys i'm trying to Kitbash a Gundam Virsago but i need some advice.

For the Main body i'm going to customize a Gundam Epyon and i've already decided on getting a Shenlong Gundam for 1 of the 2 stretchy arms.

Any more reccomendations? For Parts or even just general advice? Which scale would this be best (even if i'm aiming for 1/100)