After the work week from hell I finally have a chance to follow this.
Walter, I owe you an apology, I'll get in touch probably tomorrow as I've got a "dinner party" to go to. Just what I need!
I can't see what these double forks could do that normal forks couldn't.
Two spring rates? put two springs in normal usd forks.
Two damping rates? halve the damping chamber size and use two of them. But a well designed shim stack should do the job or you could use, as Nathan said, a PD style set up.
What I can see is two more seals, a I understand that modern seals are prone to leakage.
Two more points of movement, sliders, tubes etc. This give would give less rigidity and there would be, I imagine less overlap between the inners and outers.
The guy's done a great job and I love this type of engineering but I can't see too much advantage to it.
Having said all that I'd still love to see what's inside!