Cool results. I am happy with these, because there is lots of potential. Like purrin I did not really notice the 12k peak and found them very relaxed in the upper mids and highs.
The 12k peak can surely be dealt with.
I did not do a lot of tweaking on these, since I had been focussing on the StratoGrados and I decided to send them in together to let me find out which setup had more potential.
FYI, these use the Sennheiser PX 100ii drivers. Cups and drivers are damped as in the StratoGrados. And I guess using felt instead of damping paper behind the driver might bring down the 12k peak while at the same time still keep the lower frequencies tame.