Would it be possible for us to remap the element that clone is attached to? For example, if a clone pixel reproduces NITR right now, I would have the ability to change it to liquid rubidium, or even change it to clone nothing at all (until the next element hits it, of course).
Clone is perfectly easy to deal with. I've made lasers that have separated pixels of clone that all produce Photons without appearing to have been exposed to them, when in fact a bit of stamping trickery was involved.