Yea chaddro, I remember your post. I also had reservations about the ultrasonic process. Not so much the ultra sonic part, but the letting someone else work on your head part. HAL says the membranes between channels are critically fragile. Too much pressure in either direction will blow them out and end you up mixing colors when you don't want to be. He also warns to only get the face wet. In that same shower image it looks like more than the printhead face got wet.
Yes, the new head I purchased was the one off ebay that you gave me the heads-up on some months ago, from "Mo". That's the one we are using now. It works as if brand new - which it should because it is. The resulting perfectly clear nozzle check-print looks unfamiliarly amazing. Suddenly this 7900 has lost all it's character. All the dynamite I've been stock-piling is now way too much to blow up just one dead head. I've been secretly planning on blowing up the whole machine. Dam.
In a pretty huge way I wish HAL had jumped the Epson wall two and a half months before he did. I likely never would have shipped our head out. Instead I did, and as a result I am left here today staring at a flirtatious, unused, tiny red bottle on my desk reflecting the afternoon sunlight through it's iridescent inners in a painfully suggestive way. If plastic could speak I'm pretty sure this bottle would whisper, "You do know I am the answer to all your problems, don't you?"