My question is When to switch from t 100 mg every week to EOD. I had my last shot sat (100mg). When shoud I give my smaller dose for the new schedule?
You could do it as soon as you want. In the long-run your levels will even out, and a “spike” in the road won’t matter at all. If you wanted to play it “safe” (quotes because you are using such small amounts of Test so you aren’t risking using too much: many guys are on 200mg a week and take 100mg 3-4 days apart) you could wait for the quarter-life of your particular ester and start then. You didn’t mention what you take, but if it’s Cypionate or Enanthate you’d wait 3-4 days.