This thread has been troubling me for some reason.
1 V. doesn't want to transition to full time.
To me full time is 24/7 365. not back and forth.
2 She wants the effects of hrt, but keep function.
It's possible, but no one knows how your body will react.
For instance, My Dr. had me on a low dose of Spiro. and a high dose of E. What happened was when my E levels go to a certain level, my body converted it to testerone. That was like a death sentence to me. So he upped my Spiro, and lowered my E.
My point is Excessive levels of estrogen can become testerone, so you are going backwards.

3 This is just my opinion. What if you do get your much wanted breasts. You go to the beach or where ever, in male mode, are you going to keep your shirt on? how will you explain you boobs, Gynecomast? well those Male breasts look a whole lot different than female breasts.

We do not mean to be preachy, but this is a dangerous road. please think things through, before you commit to this path.