I have a form question as exercises pertain to triceps. I have always been told (side note - anyone ever notice that newer guys like me always have a crowd that has "told" them shit? Where do we get this stuff?) that when doing exercises like skull crushers or overhead triceps extensions, elbows should stay "in," or close to the body. But, I see vids of the bigger dudes with elbows out. My question - does elbow position really matter? Should it be "in," until you amass enough size to negate this ability? Direction is appreciated.