I was looking around trying to find a replacement cushion for my 450 that was bigger because the small one it comes with crushes my ear when I'm wearing it. I found a website that sells kit to put a MUCH bigger cushion on and Holy crap what a difference it made! I can wear the thing all day without having to switch ears or it hurting. I also got the cushion for the other side that touches your head and didn't realize how much that thing hurt too. And for like 35 bucks it feels like a brand new headset without the price tag.
Guys website is
Wheelhousecomposites.com