How do you get some sense from acknowledged experts when they might not always agree?

The answer is to use the Delphi Technique to provide feedback so that the experts can gather their views and where consensus is possible revise and review. Of course not everyone will agree and the strength of Delphi is to identify when there is a divergence of views and to seek and justify further explanation.

Delphi helps you make sense of the combinations of views, it does it effectively and efficiently.