After years of pain, I was also diagnosed with TOS. I will not go for surgery however, as this can make things more complicated. A split keyboard (I got the moonlander some months ago) did have a little effect for me, however not a huge one I was hoping for. I'm trying/doing a lot of posture related exercises. Some days its better, some days its hard to get through the work day. Would appreciate any hints which made things better for others with TOS and a desk job. It's a constant trial & error with ups and downs here.