So after reading a few injections recipes, I tried it on a pork shoulder a couple of weeks ago. Actually did one with and one without to compare; all votes went to the injected I started out by patting rub on all sides but the 'top'. I worked the needle around from the top before rubbing, never piercing the sides or bottom. I was nervous about piercing the muscle and 40-140*-in-4; I barely cleared it. So I looked around and saw mention of injecting after the meat has been smoking for 4 hours... Can anyone share some insight or experiences? Is it feasible? Safe?