Oh right I thought I should be starting it before 3 weeks post last shot. My friend who did the same cycle tapered the dosages from weeks 1 to 3, but if 20mg a day is all thats required I'll stick with that.
I always believed with Sustanon (and deca, eq if in cycle) that 3 weeks is a better time to start PCT as it remains active in your body for up to 4 weeks.
With Test E and Test C 2 weeks after last injection is ok but for those with longer active lifes that 3 weeks is a bbetter time to commence.