I was just thinking about testoviron. I've had some amps for over a year that I haven't used cos it's like injecting treacleI load with 18 and inject with 24 or 23.
After I draw I put it in my armpit for 10m, warms it up well enough. My Bayer Testoviron are impossible without warming.
A 2.5cc syringe also moves better than a 5 because of less plunger surface area.