My apologies 2k1s, I shouldnt type while doing cardio.
To the OP. If you have only been lifting three years, this is an intense cycle. Lost of sides to be expected. You should run these phs solo prior to stacking/bridging so that you are familiar with your response to them. At 271 pounds, many people would question why you would jump right to SD, a very effective yet very toxic compound. It will compromise your health, so you really need to have your diet and training down. Youll also need a very hypercaloric diet, which does not make sense if you are overweight. You will be very shutdown at the end of the cycle, and you should run a 6 week PCT if you go through with this. At 271 its still unclear why when you need to push your limits though, it seems unneccessary. While I don't advocate you jumping right to AAS instead, I think Scwellingtons point is that by the time you are combining all these compounds you get less risk and a higher return pinning then with this particular cycle. If you can tell us more about your diet, training and bodyfat the board may be able to suggest alternatives that will help you meet your goals with less toxicity, and a greater likelihood of retaining your gains.