So if you were working on your own machine would replace both to solve the problem? It seems that you cannot do one without the other.
By the way, my dislike was not for your answer but more for the fact that my research had somewhat determined the answer and your response confirmed it. My dislike is that a 4 year old $600 machine needs roughly $400 in repair parts to get it running. Your answer sounds to be on point but I don't like it and like Fisher Pakel even less.