Masteron is a great compound but I agree with only using it when very lean. Similar with winny. Sure, you can use it but you won't get the most out of it and won't notice nearly the change in your physique if not lean. This to me is like guys who run anavar and think they are going to get huge so they run 100mg per day. Truth is you could just have ran dbol at 20-30mg per day for the desired results.