I don't, but will have a look around in the morning as I'm about to head to bed (UK time). My source is the opinion of numerous music professionals, I first he

I don't, but will have a look around in the morning as I'm about to head to bed (UK time). My source is the opinion of numerous music professionals, I first heard it at a young age from my cello teacher (a former concert cellist), and since then from a number of high-level professional cellists and violinists. That said, it's possible I was wrong to think that it is the case for ancient instruments such as strads, it might only be the case for younger instruments. I don't think it's anything to do with caring for instruments, but actually a case of the way it is played. I'll get back to you, hopefully!