If a person has low body fat, is it possible to go too deep with an injection using average lengths such as 1" for delts and 1.5" for glutes? I have low body fat but i like to make sure the gear gets deep inside the muscle. is there any reasons why people use 5/8" in delts and 1" in glutes with low body fat except for the pure reason of the comfort of not using such a big needle?