Viper, I'm half a year further along than you, and sad to report nothing happening in the ED arena. As my signature shows, one nerve was supposedly "spared," but maybe it was a lazy one to begin with. I've been doing the appropriate rehab protocols, but no joy. Luckily, I have an extremely understanding wife who has been 100 percent supportive.
I'm waiting for that remaining nerve to file for worker's comp!
The ability to have an erection isn't a life/death issue, but it has changed my self image from that of a 65-year-old with a bit of youth still about him, to that of an older kind of guy. My wife says that's ridiculous, but I guess it's just a "man thing."
We're still not ready to go the injection route, though.
I hit the "edit" button to add the following thought: your relatively younger age and lower Gleason scores probably bode well for a faster return of function in your case. I hope so.