Ok so theres 23 pages of crap here that I am not going to read through, so apologies if this is redundant. But I performed this modificiation and I have some technical data to report.
I tested several different configurations:
- inductive coil inside the phone under battery cover
- inductive coil inside the phone under the battery cover inside a diztronic rubber case
- finally inductive coil outside of phone inside diztronic case.
Bottom line, the touchstone powered with its 1A charger or even a 3rd party 700mA charger charges the GNex the exact same. The field it generates is more than strong enough to penetrate a rubber case and the battery cover with no loss in charging current.
Measured charging current, consistent across all trials: 430mA. The GNex simply does not want any larger than that though the pogo pins in this configuration.
So feel free use whatever configuration you want but do not expect to see a charge rate greater than 430mA.
I chose to put the coil on the inside of the case allowing me to use several Neodymium N52 Magnets to very securely hold the Nexus to the Touchstone. The standard battery cover would not close when I had inside the phone.