Ive tried this now for a while now and I feel like it works much better than regular injections. I filled up a regular 1cc Insulin syringe w/ a Tren 75mg. Then I would grab the sink hard and flex my triceps. Then w/ the other arm I would inject in the top of my tricep still flexing. Aspirate slowly. (Ive never aspirated blood before) I then inject slowly. Then when done take off the syringe and relax the muscle. Wala! This technique seems too keep the fast acting in the muscle where it belongs. It has worked wonders on my triceps. And I find it much easier than stabbing w/ a deeper needle. And there seems to be no to little blood or oil leakage from site. Im trying it on my deltoids now and so far they seem more rounder.