From the looks of things, the mod consists of:
- Dynamat Extreme all over the back of the headphone while leaving the "holes" open.
- Some amount of tissue paper/toilet paper behind the oval white fabric screen.  I'm guessing this is the same size as the screen?
- A 1cm thick paper ring ontop of the oval white fabric screen.
- Some shelf liner and mesh, presumably to hold down the front/provide some protection/for comfort. 

Would this be correct?

From the looks of things, the mod consists of:
- Dynamat Extreme all over the back of the headphone while leaving the "holes" open.
- Some amount of tissue paper/toilet paper behind the oval white fabric screen.  I'm guessing this is the same size as the screen?
- A 1cm thick paper ring ontop of the oval white fabric screen.
- Some shelf liner and mesh, presumably to hold down the front/provide some protection/for comfort. 

Would this be correct?

Yes. That is quite correct. The steel mesh actually serves a different purpose that I'll mention later on.

As for dynamat, it's actually in more spots than just the back. Basically... any surface that could have taken dynamat was pretty much covered in the stuff.

So will you have a post putting everything together?

Yes. As soon as I have confirmed that it will work with a 2nd pair of HD600.

I don't believe in not revealing things and keeping them proprietary. I just need to confirm the effect of the mod as well as further applicability.

Haha, you know...

That's actually a good idea if you don't mind. I'll do this one for free since you helped me out with LCD-2 and all.

Will PM you with details. Hopefully, this one will give you incentive to keep the HD600 along with your other high-end headphones.

God, saw your new avatar. I DON"T WANT your glasses as part of the mod