Problem is, while you can devise ways of converting 24p to interlaced 29.97, getting from 48 progressive frames to 60 progressive frames isn't obvious to me at

Problem is, while you can devise ways of converting 24p to interlaced 29.97, getting from 48 progressive frames to 60 progressive frames isn't obvious to me at all. You'd have to add a frame every 4 frames. This would likely ruin the whole large framerate experience.