Arnie had some big flaws. Very uneven biceps, his right arm had a huge egg shaped peak but his left arm was kinda flat. Almost never do you see him do a straight on dubble bi shot. He does do a rear dubble bi shot that hides his weaker left arm.  Some of the worst sloped shoulder around. Not to say he had bad shoulder development just not the best genetics in the world- he was no Scott Wilson. Just my opinion