Looking back on 'The Saga' thread, it took me quite some time to hit zero RoM. So in that way you are way ahead of me! Good for you Neil. For me, the swelling really took about 3-4 months to calm down, and that was part of my RoM problem. Every time the swelling would get to minimal, I'd work the leg enough to raise the swelling back up. But about 16 weeks in, it all started to calm down and I made fast progress.
FYI - now, some 2+ years later, my left (new) knee is never an issue, and is very strong. Wish my new hip was doing as well. Weather changes are still an issue for me, but nothing like it was prior to the replacement.