Hi and many thanks for the input. I have since been to see a chiropractor and his opinion is that my pelvis appears to be tilting upwards somewhat on the right side (same side as knee problem). It gives the appearance of a shorter leg yet the measurements show they are the same. He also clearly pointed out that the quad muscle in my right leg is inferior to the left (vastus medialis obliquus) however this is my dominant leg and should be bigger - he said 15mm less (circumference). It has been like this before the surgery as I happen to have a photo to compare. He says the muscles in the back acting on the pelvis are tight. simple resistance tests show my hip extension laterally and posteriorly is weaker on this side too. I will continue with treatment and his recommendations to see what can be done.