Holy carp this thing is genius!
I actually doubted the effect of the flexible edge piece have on improving corner cutting, but after seeing the design of the corner piece, I realized that it would actually eliminate reverse-cutting lockups completely.
The only source of lock-ups when attempting a reverse corner-cutting is the outside cubies catching on each other; edge-to-edge and center-to-corner.
But for the inside section of the pieces, it makes no difference to them whether you are doing a foward or reverse cutting. It doesn't matter to them, as they simply glide over each other anyway.
What this means that if you eliminate the only factor causing the locks (the outside cubies "pushing" against each other in when reverse-cutting), the cube could reverse-cut at extreme angles, which is what the design have done here.
In addition, the profile of the corner piece (I'll explain how that works later) combined with the flexible edge cubie will allow all angles of foward-cutting to be almost indifferent from each other (meaning that it takes approximately the same amount of force to cut 1/2 cubie as to cut 1 cubie).
Wow, the cubing world really is changing dramatically, just in a course of one month :O
