I'm a custodes player in 40K and i wanted to try the opposite end of the spectrum (cannon fodder army), but I worry that the rat models that games workshops offers just aren't sexy enough. I found some suitably busty rats on etsy, though! is it okay to use 3rd party models in your army, or are there rules against it? i'm a casual player, so i'm not doing any faggy GW-funded events.