Looks like this mod works with the KSC35 as well. How does the clip come off?
I tried snapping the clip off using a little force, but when it didn't I stopped. I don't want to break these marvelous headphones.
You need to follow through on your yanking. It is pretty hard at first but eventually, it will come off. Yank it horizontally (to the direction of the lettering "Koss") but still pulling straight away from the driver. Grab hold of the 'phones at the rounded back of the 'phones (around where the clip is attached) as leverage while pulling. I hope that helps!