Zero padding (the default) is clearly not the right value for LATISS, which can have some pretty bad boresight values. Merlin Fisher-Levine guesses
I think it's often off by, say, up to a CCD width (probably only a little over half, but maybe full)
so let's go with 4k.
I'll patch the old visits on another ticket; let's make sure new ones get the right padding first so we don't end up playing whack-a-mole.