your stack looks great............

clen for 16 days is good....it loses it anabolic abilities after about 18 days.. and the thermogenic properties subside after about 6 weeks....

i take some type of ephedrine product in various doses most of the time....either to burn fat or to boost energy for a workout....dont see a need for the space between clen and ephedrine....the space may cut down on the "gitters", but i dont mind them much......