wow I forgot about this thread... Thanks for the kind words fellas!!
Here are some finished pics.
I reverted back to the SR headband. I spent a LOT of time comparing this HF1 to the stock one, and a headphile C-pad mod at the SF meet.
Compared to the stock HF1 mine has warmer / fuller mids. Mids also have a sense of depth and reverberation as notes and sounds decay. Its an interestng sound. Those who are after accuracy will be even less impressed with this HF1. Those wanting a sense of vibrance and depth will enjoy them. It takes an already colored HF1 and adds just a little more to the sound.... its another ~5%.
Bass response is nearly identical in terms of impact. If anything, its a llittle less "one-note" sounding.
The C-pad Headphile HF1 is a completely different animal. Bass extends deeper, and has a little less thump, and treble sparkles more. Mids, vocals and guitars are much less in the head sounding. IMHO its much more AKG sounding than Grado sounding. Spectral image is... different, with a weaker center stage image. It IS an impressive headphone, but to my ears theres not enough "Grado" in them. If you have an HF1 and want to overhaul the sound, this is the way to go.
There are some pics of me wearing them in the latest SF meet thread. They got LOT of laughs at the meet. They ARE huge.
Enjoy!!... Not shure what my next project will be? I have some woody HD580 ideas thougth.