Hi BAM-
Your progress is astounding, which is wonderful. And, I am envious of the amount of time you can spend in the water at this point in your recovery. I had a THR of my left hip due to Avascular Necrosis, and I am at 11 weeks this coming Monday. Woo Hoo! I was cleared to get in the water at my 6 week checkup, and probably could have by around week 4. But my PT cautioned me to go slowly, doing only the exercises she provided for me, initially. I assured her that I have been an avid swimmer since I was around 3-4 years old, but she said some of my muscles were not strong enough... I have started water aerobics recently, and it is wonderful even just being in the water again. And, I have stayed at my own pace, not trying to keep up with the class. So far so good.
A question for you, BAM. Are you actually swimming, especially including the flutter kick/free style breast stroke? While I have not been cautioned about it, I have heard some Hippies on the site say they were told not to.
Take care and I wish you a speedy recovery in working on your gait.
Reno