Wow, Becky, getting in and out of the bath AND full rotation on the bike? I can't do either! My first thought was also perhaps the MUA is not needed? I tried a *dry-run* with the bathtub with DH on standby a few days ago; no way; pffft. Epic fail! Granted, it's just a basic tub, not a model like yours, but I couldn't even lower myself into it. PT won't even let me try their bike yet, so I've no idea on that score. They said something about flexion needing to be around 100-110 for cycling and last I knew, I was at 94.
Check out @dvannies thread; she just had an MUA and she also has some other interesting info there.
@Mister also had an MUA and I'm sure both would be happy to discuss it with you.
I had many nights where I seriously thought I'd developed Restless Leg Syndrome. As
@Polkadot says, she feels like a Rotisserie chicken all night; aargggh!
This is certainly "The Summer That Wasn't," for so many here, but for you and anyone else that had staged knees from Spring until Summer, it's just way too long. Of course you want this to be over, but at least you're in good company here. Group wail, anyone?