Thanks all. I might try yoga at a local venue, it can't do any harm. I am hoping I can get the spread eagle. Already my hips are more open as a result of constant stretching, pushing the upper legs and not the knees, I don't want to damage my knees. I am hoping this lack of 'open hips' business is due to the musculature, and lack of stretch over the years, rather than the shape of the pelvis. If so, stretching will eventually do it, it might take a year or two, but that's fine. I've heard someone who thought they would never do it, did manage it eventually.