At the end of my physical therapy session today, the therapist asked if I were stretching my knee at home. I said I used some weights but they are light, I need heavier weight. He went to another table and grabbed a heavy weight, asked me to lie back down on the table, and he attached the weight to my knee. Said to take it home, borrow it, put it on when I am sitting with my leg on a short stool, keep it on for several minutes.
I have put it on several times today and intend to use it several times a day. Hoping it helps. Certainly can't hurt.
I think I'm walking a bit better in general. I wonder if the leg-straightening is part of the reason.