Almost all my pins are in my delta. I like to pin in the sites that I want to grow; therefore, my delts get pinned in all three heads EOD or ED. I throw in arms in the areas I want to grow. Site injection works for me, especially when I throw in a small amount of NPP into the mix. I very rarely hit a vein and never a nerve, if I do hit a vein it's usually a small surface capillary leaving a small bruise. For some reason I get more pain and baseball knots in my Glutes.