This is the third phone I've installed a Touchstone mod on, the earlier two being the Epic 4G Touch and Nexus S 4G. I think this is a little easier than either of those mods. As for longevity of a Touchstone mod, all three phones are still being used in my household and touchstone charging is still working on all three.
To summarize the usual disclaimers: if you can't afford to damage your phone or void the warranty, you probably shouldn't open it and chop on it.
That said, if you've ever used a Palm Pre with Touchstone charging you would probably agree with me that it can be to go back to charging by wire. I continue to be impressed by how easy it is to add touchstone charging to phones but I wish manufacturers would start implementing this out of the box.
To start, you need a Samsung Galaxy Note (the GSM version is shown here) and a Palm Pre or Pixi battery door with inductive charging coil:
Peel the charging coil out of the Pre/Pixi back and trim off the plastic backing behind the charging circuit (noted by the arrows):
Place the Galaxy Note battery cover on the Touchstone and put the charging coil on top of it, letting the metal studs around the coil align with the magnets in the Touchstone:
It is at this point that you should choose how you want the Note to line up with the Touchstone. In my case, to get good clearance between the table and the bottom of the Note, I placed the coil below the center-line of the back which means that it can't practically be rotated into the landscape position. If this is a problem, you can try centering the coil on the back and elevating the Touchstone with a shim instead. You can look at the finished product by resting the phone on top of the back:
Using a knife edge, scribe an outline around the charging circuit to mark it's location, then remove the coil:
Cut out along the scribe lines:
Remove the charging coil and circuit from the plastic and foil that they are adhered to and place them on the inside of the Note battery door:
[to be cont'd...]