You should be running Hawthorne as well as comprehensive cycle support the entire time through. As far as the 3 weeks go this is from Unreal's guide to superdrol "However you decide to run your Superdrol, it is important to keep in mind that your calories should scale with your weight. For instance, if you start a SD cycle at 200 pounds and 3800 cals, and by the 4th week you are at 215 pounds, then your calories during the 4th week should be (215/200)*3800 = 4085. Most users do not do this and so they say the gains from Superdrol stop during the 4th week. I feel this is probably a major reason why 3 week cycles with SD became so popular. But I feel 3 weekers are stupid, it's not enough time to make much REAL gains."
It's an awesome read and in the first post alone is almost everything you could want to know regarding the issue... Read up
