I hear you short story I had knee replacement one year later was getting same knee done dr put in wrong size could not get much range of motion…. Now about little 2 years after both surgeries I am still tight …. But at least I have better range with right size knee …. I am like 105 just few degrees off extension …. I have been doing mfr since 7 months after first surgery I still do maintenance now , I also have done graston , cupping , pool …. I do gym 5 days a week do treadmill 2 miles a day ….. can’t do bike causes to much pain in my hips from arthritis…so that’s my story …….if I Can get rid of some of this tightness be awesome but I am not holding my breath at this point I think I will always have …. But I can say I have a good walking stride does not hurt my hip anymore …so grateful the Second dr. Not blowing me off ….good luck I want to say it gets better but sometimes it doesn’t but never too late to try things like graston , and mfr because brakes up scar tissue…. I still do booth …. Good luck