Well...if you bring the upper guard back towards the grip, it eliminates supporting the spine with the off-hand palm. And that's what would allow you to block a heavy incoming attack.
That whole idea needs more thunking. I hope Bram and Donna will chime in...
As to length, it can be built in any blade length between 5" and 12", no prob.
The construction type is similar to what Ernie Mayer often does with his upper and lower guards, where the tang, guards and blade are all one piece of 1/4" stock and then ground to outline. Pictures of Erne's work can be seen at:
http://www.syspac.com/~bcloud/
Harald Moeller could clearly do it, but he said a year ago he was retiring soon...I'd have to check his status. Alan Folts could too. It's not all THAT complex a design, nowhere near as crazy as The Outsider
.
Let's talk about the design first. If it gets that far, we could put it out for bid, with different price ranges for 5", 7", 9" and 12" for example.
I think it's pretty cool, or at least has potential.
Jim