I don't know bro, if I had your body at age 20 I probably would have never touched AAS. If you understand the risks and still want to go for it anyway that is on your. I personally wouldn't, as the old saying goes if it ain't broke don't fix it. Natty training has served you well, I wouldn't cycle for another 5 years and concentrate on more natty training. However, as much as I am opposed to you running a cycle at your age I somehow feel obligated to assist you. I think you will run a cycle regardless of any advice against it, and the last thing you need is to run it incorrectly. So if that is the case, you should throw HCG in your cycle, I would run adex at .25mg per day. I would start with 100mg eod and see how that feels, you can always bump it up, it is a fast ester. If you are man enough to stick a needle in you then you should be man enough to accept the criticism that will soon follow by experienced members. Best of luck to you, I hope you reconsider.