I agree with Klaus. and will point out that I don't always use 12mm as the focal length for panos, sometimes I use 24mm on that lens (not always by mistake
) And I have other lenses than the 12-24mm and another camera body than the 5D. So the preset for the "force" values is nice, but only works for one pano at a time, so its a "preset" that you sometimes have to change for each pano.
Also, if APG gets the pano really wrong due to a bad link, it gets the focal length really wrong and doesn't want to reset it. There's no easy way to reset the focal length of all the images at once in the CP editor (leading to the "can't close the circle" problem I occasionally get).