Serious question this. Sat here still doing more work on my part for VW (Butlins 2 section). If a malignant pig rushed across the stage and ate my music I reckon I know it that well it wouldn't bother me. The only thing which will let me down now will be nerves. How do you know when you've really done enough and there is no more music to be found? Soloists don't use music very often. Does there come a point when it becomes stale and you can really overdo it?