proceed with caution
If you've never uses Sustanon before, I'd proceed with caution. I used it years ago and it gave me great gains and made me very strong, but the shots hurt like hell. Some people don't have any prob. with it, others, like me, it's like getting kicked in the ass cheek by a donkey once-a-week. I used the redijects and only did 1cc. It hurt so much it just wasn't worth it. I can't imagine what 4cc would have done. And I've done plenty of 3 & 4 cc shots with primo no prob. So, if you want to do 2,3, or 4 cc, I'd BEGIN with just 1, or even 1/2 to see how you react. BTW, I'm new HERE, and don't claim to know near as much as the top dogs here, but I've been in this game for over 25 years...