I recently bought a 986 that had been in the east for a while. I was trying to figure out why the MC was empty. Well after filling the reservoir and bleeding the brakes I had some brake, but as I depressing the brake pedal I heard a hissing and there I found the leak.
My point is if you are in an area where corrosion is an issue you may want to check the brake lines where they are held by clips.
Now I am looking for hard lines from the block in the picture to the caliper connection. I have reached out to Woody in Bastrop.
John