Thanks biggin' that was a great response, and I understand to start low and always use what you need. I have always used 500mg/wk of test as I figured anything less wouldn't be effective for me. I've had good experience with it, and never had any negative side effects other then increased confidence, libido, and strength. I wouldn't go higher then 500 since I don't like to pin more than twice a week, and pushing 3ml per pin is enough in one site for me.

But thanks for the explanation, much appreciated.