Brilliant. A MRI would be very helpful for a more thorough diagnosis.
if a ligament is missing between teh scapholunate then a full write fusion seemes excessive and that a small fusion of those 2 would be debilitating but may help to remove the pain and allow you a significant enough amount of rom ton continue your work. it wouldn't be like wearing a brace.
Really interesting case. Definately a long read. Once you have MRI results get back to us. hopefully surgery isn't actually required.