Don't have much to add here, but I'd like to remind everyone of what demographic we're dealing with and how the mapping scene deals with these time factors currently. If we make the cutoff 4:00, A significant portion of full anime OP's and ED's are going to make the cutoff (things the demographics like), which I believe will make them appear more in the mapping scene, unlike how I believe they are currently neglected a bit (not in the literal sense). If we make the cutoff 4:30, not so much. I wouldn't want to talk much because I don't really know the more technical or obscure stuff, but I agree with -Mo-'s proposal here. Even in that case, remember that we don't exactly have to settle for 3:00/4:00/5:00 or 3:30/4:30/5:00. We can do stuff like 2:30/3:30/5:00 (While I know may seem unreasonable, but this is just a reminder).