first of all i am not a fan of short cycles. Reason is that you stop right when the gear kicks in. So you are wasting gear because you are not allowing yourself to get the full effect of gear. Second, you will not have consistant test levels which can result in undesired side FX. You are taking test which takes about two weeks after your last shot to leave your system then 1 week later you are back on. This yoyo effect is just no good in my opinion. But if it works for you then go for it bro. Now, going back to your question. How much is too much? That all depends on your body. Some get bad side fx from gear at different amounts. This is what i can tell you. If you got good results from Eq at 600mgs then why increase the dose?? All your doing is saturating your receptors, increasing the chance of side fx and making it so that your body needs more time to recover. Most don't realize that more gear will not really give you better results. You only increase the amount if you have reached a CHEMICAL plateu. Which means that when you can't train any harder and eat anymore or better than you already are then you up the dose. One last thing is that the higher you go if not needed then the higher you must go next time around to get the same effect you got with a lesser amount. I have done a good amount of cycles(most trial and error aka newbie) but i have never gone above 550mgs of test and each time i am happy with the results. well i hope i gave you a better idea of how to approach this issue. good bud!!