Rear Caliper Stripped Thread

[JoeRock]

I'm not sure how it really happened because i always use copper grease and a torque wrench, and i'm not heavy handed anyway, but i've managed to strip the thread on the rear caliper where the back pad pin goes.  :'(
There's a tiny bit of bite there so i've Loctite'd it for now, but was wondering if it can be safely helicoiled or not?
There doesn't appear to be much room to play with, and was also wondering if there's a chance i could damage a brake fluid chamber as well?

Has anyone tried this before, or are there any other options other than a replacement caliper?
Cheers, Darrsi.  :\

Are you by any chance using copper grease and still using the torque settings recommended by the manufacturer? THat'd be why! Most torque settings are dry threaded (unless specifically saying otherwise), if you put copper grease on you need to drop the torque by about 25% in order to stop the threads from deforming as they slide easier with the grease on, thus giving you a false reading!