Isn't that almost impossible?!?! My cousin has diabetes and i've seen his insulin needles and it looks like there is no way you could (well maybe but i mean it would truly take just far too long, you'd have to spend like 10 minutes on the injection alone!!!)
I don't know WHY you would want to use the insulin needles (unless other needles are hard and illegal to find). I use Terumo needles, 3cc syringes, 22G, 1.5 inches, and they are NOT painful! I am also doing SUSTANON now, and they work just fine. I inject into the quads...great place. As a matter of fact, i'll be doing a shot today, very very soon.