I can inform you that we still only support screen sizes up to 27″ so anything larger, you will have issues in tracking with this
screen. This does not mean that the 27″ of a 35″ screen will track normally.. we cannot guarantee that.
Assuming you indeed go for a 27″ curved screen, then unfortunately you may still face issues with mounting (as you predicted) and indeed there may be accuracy issues at the extremities of the screen where the curving is obviously greatest.
For right now, I can only recommend you go with a regular flat monitor at most 27″ in size.