Cool! I only put mine on the parts-express headband, and removed the plastic driver cover. You prompted me to throw them on right now. Still great :)
Now I've ordered a pair of these. Can't wait to see what they sound like. Then I look forward to trying out some mods.
I've always been a budget DIY'er and Head-Fi has been an incredible source of information and ideas. Thanks guys.
I will be very interested in your comparison of the s400 and your modded ksc75's!