Yes I have seen most of those links - but thank you for posting them.  I should mention that I do take beta blockers which help to a point, and that is a common piece of advice.  I did read about one cellist finding some control over the shaking by tensing the upper arm, and a violinist who seemed to improve by gripping the bow more.  All things I've spent the last 5 years trying not to do!  But I will be giving these a go to see what happens.