How goes the progress on the PCB coils?

I just stumbled upon this:

http://www.digikey.ca/product-detail...2265-ND/703454

Digi-Key Part Number: 240-2265-ND

It`s a 20mm square ferrite plate. Id imagine if you stuck it to the back of one of the coils, it might better concentrate the magnetic flux and increase the coil`s influence on the magnet. Bringing the magnet closer to the coil would further help coupling.


- UD