Thanks very much Dr, that really puts my mind at ease re cauda equina which was my concern.
No kyphosis, no children, yes L4/L5 and no progression to scoliosis since 1984. My pains are bearable as long as I can find somewhere to sit. I just want to take the opportunity to mention that the first specialist I saw recommended that I should have fusion abut the 2nd opinion I went for did not recommend surgery. So what I am saying to those reading is sometimes it is helpful to get another opinion and yes I agree, any online forums suggestions/advise are to open our eyes and options and not to be taken as formal medical advise.
Thanks again, muchly appreciated.