It is a bad invention. If it hasn't been done before it is for a reason.
All of the 10 guitars I sampled had warped necks. making a cut, through the fretboard, all the way through the heel is messing with the stasis of the guitar, stasis based on a contiguous neck.
At the point of the greatest tension is this cut. The heel wanders around as well, like a three bolt Fender, you can move the heel thus making the intonation, neck angle and overall playability change with little pressure.
The cut into the fretboard, besides being ugly, is going to wear unevenly. Besides being an idiotic invention it is a true waste of money, badly finished and ham handed.