I'm going to go ahead and open this up again, since I managed to fix the grip! Here's how:
- Do
not open the grip up. You probably won't need to, and getting the casing for the contacts off without breaking something seems nearly impossible.
- Find a drill holder like
this one used for making Warhammer models
- Find a drill bit approximately 0.6 - 0.8mm wide.
- Carefully drill into the hole around the stuck contact. Swivel the drill bit around a little while drilling.
- In regular intervals, remove the drill bit and turn the grip upside down. Pat gently on the bottom and the contact should spring out.
- Go forth and take portait-aligned photos without twisting your wrist out of alignment! =)
Good luck!