I think a simpler solution would be to require them to post an enormous bond that would tank the company if it came due in the result of a failure in the field.

I think a simpler solution would be to require them to post an enormous bond that would tank the company if it came due in the result of a failure in the field. They can ask for engineering data, but that can fudged. Asking them to bet the company on it is a much surer bet, imho.