I personally LOVE quads for injection(you know outside only, right), only problem I EVER had was Glutes. I also find triceps (yes) an excellent inject site, no problems ever. Biceps work well too. I HATE delt injections, always get sore. You can do calves too, Be careful of veins. Believe it or not, lats are a good site if yours are pretty thick, again, beware of veins.