The t-3 MUST be taken with AS to avoid burning up muscle.That is why i take it at the start of my cycle. I'm no expert but after multiple years of AS use i have found that switching to a short acting ester such as primo or cypionate allows the body to clean out faster and thus allowing your natural levels to get back to normal quicker. This and still training heavy and intense will help to maximise the gains kept after a cycle. Stacking high doses of primo with the 250 seems like a waste to me. i started off 4 years ago using AS at 180lbs. Now i'm 240 and I have been off for over 8 months and i'm still 235-240 and i'm still training with about 85% of the weights i used while i was on.Steady gains and hard work will far out way and out last fast non lasting gains from really heavy cycles.World class powerlifters stay on low dosages of test year round and up there esters before meets to maximise strength but the low dosages allow them to make constant small steady strength gains year round and keep them. to contact me you might want to try the e-mail first..................