Creator Viktor with a third arm - what about five digits?

http://40.media.tumblr.com/c1e7cb2e7be0feb95d3d5b807a29c235/tumblr_ndawutgIK21tbpqalo1_500.png So I was just interested what this skin could look like with a third arm instead of the cannon. And if he can have five fingers on his artificial right hand, why not on the third as well?