Sociable distancing has encouraged me to catch up on a couple of unfinished projects. I finally replaced the destroyed ear cushions on my Sennheiser HD540 Reference phones with some cheapies from China courtesy of fleaBay. Once I figured things out it was simple. The original cushions were fabric covered foam while the new ones are memory foam covered with "PU Leather". Bass is slightly enhanced but still sounds good. These are among my favorite phones. Stayed up late listening to some tracks including some live Porcupine Tree.