Yep, you have the order right.

1st try was a sponge from Home Depot I bought last night and cut up to try today.
2nd try was the closed cell foam that was in there all day Saturday.
3rd try was the open cell foam I already had and liked much more than the closed cell foam, specifically because of how much bigger the soundstage gets.

What's nice about the R10 is that the mids seem to shine through regardless for the most part.  Such an involving headphone, you don't worry about anything but the music, as overused and Merceresque as that sounds.  I don't know if you know Craig from Kuboten, but he's a proxy some of us use for nice stuff from Japan.  He's heard all the best stuff.  I remember him telling me the only two headphones that have made his hair stand on end are the R10 and SR-Omega, and that makes sense. 

Anyways, my outer ring is deteriorated and I haven't restored it yet but that's next on the list.  Once I do that I'm fairly certain the bass roll off won't be so severe. 

Even though I don't listen to it a ton (I rotate headphones), it's a headphone I don't think I'll sell for a while.  There's something about how involving that headphone is...I know if I ever sell it I'll regret it for a long time.  It'll haunt me.  blubliss came by my table and was telling me how he sold his R10 because he likes the SR-009 much more...he came back for a 2nd listen and said something like "I need to stop listening to these or I'm gonna regret selling mine." :p

Thanks a bunch for measuring these for me.

What happened with the dudes who designed/engineered the R10?