I don't know if you've thought of this, or if it would even help. I didn't have neck problems, but a variety of leg/back issues at first. I experimented with tables of different heights until I got what felt comfortable. Finally, I found a chair that, when seated, put me right at eye level with the piece on the lathe. So I now sit while sanding and using MM. Not only did it improve my sanding because I have a better angle to view, but I don't have any issues with pain. I still stand while turning, as it seems easier than trying to learn to do that seated. I had enough trouble learning to turn while standing, and I don't want to re-learn it!
I hope this gives you some ideas.