Trt is not a one size fit all ordeal my friend.. I naturally have low e2 from years of aromasin usage, along with many other people. So we welcome more e2. For me, prop daily sucks for trt. So does test e. I can never get enough e2 on those low daily doses. I take a little tne in gso daily anyways, along with my usual trt SPECIFICALLY for the estrogen that sticks around longer than the test. Which is why I figured castor oil would help slow the release of test, and possibly make it last most of the day.. Have you ever tried to brew 100mg TNE in castor oil yourself? Piece of cake in many other oils. I cant see castor being any different, just thicker. The proper solvents to make tne would considerably thin out the castor oil. This isn't reinventing the wheel at all. This thinking outside the box for a solution. Try it sometimes.