Stopstart
My 1st post, although tongue in cheek and nothing to do with this thread, was that I didn't actually recall the J working out of Thumrait - or at least certainly nowhere near as much as the K. It was purely in reply to Mr Epi's comment about "higher further faster". But have now lost interest as don't wish to descend into slanging match, and so shall leave the thread to the original engine question ...