I play on 400dpi 0.14 to counter my really shakey aim, problem is sometimes I get tired with all the movement I use in my arm to turn, any tips on improving aim and crosshairplacement on higher dpi/sens?

Am I the only one that would buy so many more skins if we could select different skins for each side? I mean currently I'm like * "meh I like this skin set but I already have skins for those weapons that I already like so what's the point...