Congrats, DHM! Glad you like your Baha.
As for numbness, at least some of us have permanent numbness; I got my Baha in 2008 and there are still some small areas that are partially or completely numb. Also some areas of altered sensation--if I touch one corner of the graft site, it causes a "tight" sensation (not uncomfortable, just a little odd) in another area. None of this is problematical. Numbness on a small part of your head is virtually insignificant.
I had to wear the "cup" bandage for the entire first week, until I went back for the recheck with the surgeon. However, that is apparently highly unusual (and not comfortable).
I got my Baha three months post-op. The abutment seems rock-solid.
Nancy T (also a PNW person, feeling right at home in all this rain again...)