Wills;
I didn't have time to read all the comments above, therefore, I will offer my input on your original thread/question.
I suggest not contacting a lawyer, or anyone else until you exhaust all other options. Having stated this, the cover appears to be vacuum formed (?) from PVC material. Having experience with PVC in terms of the vacuum forming process of molding covers, it is very brittle and will crack/break with little vibration. If this cover was molded from a different material, it would most likely not be a problem. However, in the end, this is the decision of the manufacturer.
"If it were me",....at this point, I would ship the system back to them for their inspection/testing/review. By doing this they have the opportunity to improve it. If they do not, and they offer their explanation, then you can conclude that they are offering truthful information/research; or, not.
Best and good luck;
Ed Valentine
cross-american corp.