Edge ? Edge of what ? I have never felt as if I were on the edge of anything in particular so as I don't fully understand the question I cannot help with an answer. Are your problems physical or mental ? Do you really want to play exactly as you played many years ago ? Is it that simple ? I don't think I do. I actually posted examples in the audition room of how I played thirty to forty years ago but I can't say I want to go back to it. It was musically genuine and full of a natural, if odd virtuosity but it has become a very small part of the musical landscape I enjoy today. I can sit down, play and create like that any time I choose but if that is what you mean by an "edge" - a retrospective wish to play and think precisely as I did in my teens and twenties - good heavens no, I've come too far and the way ahead is much more interesting.Are you sure you are not just viewing the past through inappropriately rosy spectacles ?But I am just guessing; perhaps you mean something entirely different.