Local GP referred me today to another quack - it's OK, guys, that's my generic term for all of that indispensable profession (if we were 100% fit and well, we COULD dispense with 'em) - one who does those tricky knee reconstruction jobs. Good luck to him. Good luck to ME! More in due course. Meanwhile I must remember not to climb ladders or similar up-stepping tasks, only to find there's no easy down-stepping. We should come provided at birth with spare parts of anatomy, and replacement guarantees - possibly automatic - every five years. That would work. Why has nothing been done about it, eh?