Originally Posted by cny-bikeman

It was not just my advice, but FBinNY's as well that chain length was not the cause and that twisting likely was, and apparently you missed this part of my post:

"However, if the pulley assembly/derailleur or the hanger is misaligned in the other plane (twisted) the top pulley position will change significantly."

I acknowledge I came across heavy handed, and I apologize. Probably did not help that I just left a thread where the poster rejected all but the responses that massaged his totally unrealistic expectations as hostile or useless, but I consider expecting someone to acknowledge the responsibility inherent in asking for help as well as for giving it to be an adult concept. I don't expect anyone to slavishly follow my advice or diagnosis - or anyone's.