I have been taking 500-600 mg. testosterone cyp per week, with 20 mg. Tamoxifen ed. Will be getting Tren in soon, and substituting it in for some of the test. (any suggestions on how much and how would be appreciated). My core question is this: since Tren works better with estrogen, do I stop the Tamoxifen when I start the Tren? Stats: 5'10", 290 lbs. 21" biceps, 18% bodyfat.