HI Luigipenagos
Sorry for the late answer but i havent seen your question until now so i hope you will get the message.
My Vyger had a small modification so that i could install another armbase and i have 4 diffrent armbases all costum made by a engineering. I have just put a Goldfinger Statement in the Grandesse arm and it is way better the the mk1 version, like my Koetsu Coralstone on sterioid.
I cannot imagine that i will keep the Koetsu any longer but time will show.