Well you gotta remember, this armor was modeled off of a character that is already pretty muscular. I ran into the same problem and you either have to try and modify it yourself to make it thinner so that there isn't too much room, but enough to still wear something under it and have it fit, OR you need to find someone that can slim it down for you.
I am able to modify the models, but I am swamped with my own project because I am having issues with the shin pieces being too small. :\ The sides are too tight, but it's perfect everywhere else.
I am able to modify the models, but I am swamped with my own project because I am having issues with the shin pieces being too small. :\ The sides are too tight, but it's perfect everywhere else.