Yeah, I was thinking of putting them in an ATH-AD chassis if they fit. I forgot what the size the driver is though. 53 or 55mm? 53mm would be a perfect fit while 55mm would probably be too much. If there isn't any takers, I'll probably try to experiment with that. But then again, I do want a new office chair on Black Friday so I'm not too bummed out if someone wants to take them off of me. Edit: Went back and read on the YH-100 driver size. Seems like it's 55mm. Seems like it's a bit too big as most ATH-AD headphones uses 53mm drivers. No idea if I could squeeze the drivers in.