I have never heard of TOS...
Originally, my neurologist thought I had carpal tunnel from repetitive motion injury. I designed and hand crafted my own line of jewelry. A lot of small wire work with multiple tools and really small pearls, crystals, gems, etc. I probably did not have the best posture either...now I am in constant pain in my neck and arm with club-like hands and I drop things all the time....
Arrrggghhh!!