Josh, I think single-master-format is the only workable option. I'd add to that, though, that the texts should incorporate all reasonably collectable content
during the original project, even if it's expected that it will be superfluous. Then strip it out for all devices; but it will still be there in the original.

BTW, this is as much for simplicity as for comprehensiveness. It's just easier for everyone if the instructions are the same for all projects.

This in turn implies that it may be a mistake to use an output format that we actually intend to use for some devices as the master format.