First of all, thank you for your interest to SF.
I've seen that many USF players feel envy to uqinue weapon skins from other SF services, especially TSF(Taiwan).
Taiwan send Dragonfly their own design and Dragonfly could make skins easily than any other services.
Taiwan publisher has their own desgn team which deals tiwh 3DS and its MAX file.
If there is any player or AERIA worker who can use it with own skin design, I will find a way to make USF unique design.