Or five, they aren't as aware of the situation and the specifics enough to render a judgement, esp when the writer seems to be well versed and opinionated.

BTW, the tri link manufacturer you referred to, Jim Susko, probably stopped "communicating" because you stated your opinion, he stated his, he was complete and respectful, and there was really no point in restating what he already spent time writing. I have found Jim to be a very knowledgeable engineer with a career spent in automotive suspension design. He is usually helpful and reasonable, and his post seemed right in line. His points were well stated.