My xG3 has been installed for about a month and is, at least mostly, settled. Seemingly very close to the surface of the skin. It can reliably pick up a quarter, unfortunately I don’t have paperclips handy to test them.
Sensing on the other hand seems to be minimal, likely due to the inertia factor. But I suspect it may also be due to a need for more healing, as the area around the magnet is still quite numb.
Overall I would recommend AGAINST this location for the xG3 as I don’t have high hopes for sensing and the lift benefits would likely be equal in the knife-edge of hand location or others. Also it was really freaking painful. I had 2 hours of scarification on the same day as my xG3 and would much rather sit through that again, while also spontaneously getting punched in the face.
There was also some complication with placement being too close to the joint, which after re-location lead to pocketing and thus a longer healing time.
It’s closer to the grip side of my finger than i’d like, but haven’t had any problems since it’s settled. I suspect rock-climbing might be uncomfortable, but haven’t tested yet.