There's a thread on it somewhere, but i'll give you the reader's digest version--
I took an endocrinology class, hung on to the book and did some additional research around the time I was starting T. I presented my findings to my doctor who was skeptical but let me try it on a provisional basis. I was monitored pretty closely for a while and had no adverse side effects, so I stayed on it.
After doing more research and talking with a ton of doctors (wilson, miro, petrovic, meltzer and bowers and a bunch of urologists and microsurgeons), i had a two step sorta-centurion w/ scrotoplasty, urethral lengthening and a vaginectomy. I have one scar on my perenium from the vaginectomy sutures and another hidden on the underside of my cock. I can get and maintain erections naturally, penetrate easily (thanks to some minor relocation and a mons reduction) and piss w/o issue.