I was given an old set of Koss TD-61 headphones, and the ear cushions had deteriorated. $5 to Koss, and I have a new pair of cushions! But I just can't figure out how to remove the old cushions so they can be replaced. I know that they're pretty pedestrian headphones (yes, I'm partial to my original Sennheiser HD-414 from the early '70's), but they'd still be handy to have around, minus the flaking earpads. Thanks for any advice!