I noticed it midday today.
What was different about today? I slept pretty well, and yet I was exhausted during lunch. I usually use lunch time to log in 40 minutes of Diplopia with tDCS, but I skipped it to sleep.
It was during break walking down the hallway that I noticed that I had a rather long sustained attention on the lazy eye input. It was double, but both of the streams were pretty sharp (left eye image is still a bit sharper), but the feeling and sensation was a bit jarring, and a bit unnerving, like I was about to go somewhere different. I'd look at something nearby like my thumb--still single--look off in the distance, still relatively single, which means my eyes are converging and diverging with increasing facility. I look down at my double left foot and notice that while it is still double, the images are superimposed on one another to higher degree than I recall ever seeing.
This was the most powerful perceptual change I've had that I can remember. It's not stereopsis, but I'm on the right path. I don't think it's going to happen in two months. It will probably be another year or so. But if I stick to it, I'll have stereopsis, and an entirely different way of looking at things.