I never really thought about it for this one. But I think its more of a one type specialty, designed for specific weapons. But I'm sure parts would be modified if there was an emergency need for heavy weapons.
Uhm, well not too much. I mean I'm always sorta inspired when I see really great mecha and stuff, from people like MeganeRid and such, but really the only thing was the head, which was inspired from AC, but thats sorta it.