i injected into the middle of my quad. you know the right tear drop part of your right quad? when you flex? i just followed it up to the middle of my leg and shot it where i thaught there was the most muscle. is it hard to miss a muscle in your quad? i used a 1 1/2 inch needle , but left a 1/2 inch out. the outer part of my quad seems like there is not enoug muscle. ive looked at all the pics and stuff, but they arent real clear. any suggestions would help, i guess my quad is messed up.