I'm also finding this topic extremely interesting. I hope you don't mind me chiming in, since I'm such a "newbie." Before my surgery, I read many dozens of "reports" from post-surgery rock climbers . Many of them were years after their TKR surgery. Most said that the new knee felt surprisingly stable, but many commented that it didn't quite feel "like it was their own." I imagined it would feel sort of robot-like.
I'm just coming up to 4 months for me, and I didn't get the robot-like feeling at all. With the exception of the clunking,
it just feels like a regular knee with a bunch of minor stuff wrong with it. The medial and lateral collateral ligaments get sore easily, I have plenty of unpredictable "zingers," and I have the tight band feeling that is mentioned so often. But, as the flex angle at which that tightness is felt got bigger, I started to go short periods (several minutes) where I wasn't aware of the knee. Later on, I started walking across some pretty big parking lots without any "knee awareness." But, I'd be reminded when I got into the car though! A few times, I've taken stairs without thinking about my knee, but that is still rare.
This is how I think the "tight band" feeling relates to awareness: I start getting "sensations" well before the knee gets anywhere near its maximum bend. Those sensations are what gives me the "knee awareness" that I'd rather not have. Lets say my max is 120, but I start feeling tightness at 60. I'm calling that a 50% "range to awareness."
I'm thinking/hoping that as that percentage increases, I'll be aware of the knee less and less often, over a wider range of activities. My belief is that for me to increase that percentage, I have to spend quite a bit of time actually using the leg in the uncomfortable zone. My max range won't change much, but my useful range will get larger, and my most frequent daily activities won't require enough bend to make me aware of the knee at all.
The "zingers" are a separate "source of awareness," that I hope goes away (always the optimist). I have no solution at all for the "clunking," but you are lucky if that is your biggest problem.
Sorry
@chrisknee , if this was too long. You started a great topic that a lot of people are interested in.