Hi @superkermit and thanks for your query. As you may be aware, the Tobii 4C only officially supports screen sizes up to 27 inches with 16:9 Aspect Ratio (30 inches with 21:9 Aspect Ratio). Accordingly we cannot guarantee optimal tracking at sizes outside this specification.
That being said, a number of other users have found some workaround solution that can allow for larger, curved monitors to work well with the 4C.
Especially, at this thread @ https://developer.tobii.com/community/forums/topic/ultrawide-monitors/ you should hopefully find some solutions for your needs.
However, please do bear in mind that these are not officially endorsed by Tobii so we cannot support such a setup directly.