For the past 5 months I've only managed to get mine to bend to 80 max (over that 5m period) and the last month has been to 90, so I share and feel your pain/frustration. I am finally being sent for sugery this week to repair the tear they have finally agreed is on my medial meniscus, which is assumedly why I still have pain, and restricted ROM. I know they plan on seeing how far it will bend under general as well as testing my ACL properly