Glad to hear you are back running. I have some good news about my extremely less ambitious goal. I am 15 weeks post surgery today.
For the past five weeks, I have been chipping and putting once or twice a week. About 2 weeks ago, I started hitting some balls on the range. It was hard to pull the trigger on my first real swing (with a pitching wedge) for fear of injuring the leg. In any event I worked up to my goal of 45 shots (using all of the clubs) at one time on the range without any great discomfort or additional swelling and before trying to play on the course. I played 4 holes on Saturday (was afraid to push it) and then played 9 holes on Sunday. To my surprise, my knee felt better today than at any time since surgery (my fingers are crossed as I type this). I actually played fairly well also with only a little loss of distance. I did not have any downhill lies and would be concerned about trying such a shot. I think I played ok because I swung very easy (hard to believe that I had to rip a quad to learn that lesson).
The knee is still swollen and tight. I go to therapy 3 times a week and I know I could not run on the leg. A knee sleeve makes all the difference for me in terms of easing discomfort (I don't know if this is all in my mind or if it actually does something). I ice after every activity which helps also. However, after 4 months, I think I can see a light at the end of the tunnel. My ROM is 130 to 136 - depending on the swelling - and I walk pretty slowly up and particulary down hills. Still, I was out of the house, walking and playing golf, and that felt great!!!
As many of you have said, patience is the key. I never pushed ROM and I took days off from therapy or at least reduced the amount of exercise when the knee hurt too much.
Good luck to all of you.