Lu,
I have considered in my daydreams, that not only should I get my other hip resurfaced, but have those sections of my lumbar replaced my metal components. And my neck too. My upper back is not too bad, a little curved, but might as well do that at the same time, do the entire spine in one go. My knees click a lot, so do them as well. My arms are stiff, I know it is muscular, but my left shoulder clicks, so do that one too. And the right shoulder. My thumb joints have been sore for many years. I do not think there are any implants designed yet for thumbs, but I would want them.
In fact, with the benefit of movement that I have gained with my left hip resurfacing compared with the grisly bit of cartilage that wore out, I should really have every single joint replaced with metal parts. This should help with 'startup stiffness' and relieve back pain.
As I have mentioned before, Lu, I am glad you take me seriously. And I think everyone else should too.
Keep riding!
D.