VC, that's a tough rehab. Keep with it, you'll soon be back to full speed.
I'm a bit more fortunate than you. My injury was 2/26, surgery 3/16. Last week, I rode 210 miles outdoors with an equivalent 18 or so on the stationary bike. My knee was a bit swollen on Monday. But I've go no legitimate reason to complain.
My OS told me that it'll be a full year to recover. I'm feeling that my cycling is at about 90%. My cycling coach thinks I'm well ahead of where he thought I'd be. My power numbers are still a bit down from last year, although my average speeds are not off much from last year. I am not, however, climbing as much as I did last year.
This weekend will be my first "full load" weekend. I've got a 5+ hour ride Saturday, with a 3-4 hour ride Sunday. It'll be interesting to see how it goes.