Been studying many of @Bill Roberts articles which all are amazingly written. However I have a question I can't quite understand the answer to. I'm currently on trt 150mg test per week, pinning twice of 75mg every 3 or 4 days. Since this is a permanent external source of test, I don't need to worry about having my production come back after a cycle. However I do think my estrogen levels creep up occasionally and affect libido, erections and other aspects. Of course I'd like my natural production to stay active as much as possible, and I realize that's an hcg issue, that's for another topic. So my question is would arimidex or tamoxifen be appropriate at low to moderate levels throughout the trt regimen. I know the simple answer is an AI will lower my estrogen but I'm wondering what benefits a serm would give me in relation to my estrogen and or natural production of test.