I will be hitting 25 in a few month's and I'm finally at the physical point where I wanted to use SD. I have a stash that I bought 2 years ago before the ban. I have some transdermal 4AD, would this be a bad idea to through into the mix. Also I have been reading around I notice that mostly everyone is running a 3 week SD cycle, when it first came out the 4 week was recommended, what has changed to make a 3 week safer/optimal?