I'm starting to believe that my two brain cells are fighting, again. I ride an 07 RK, but that has nothing to do with my brain cells. Anyway, I seem to recall that someone made a two tiered luggage rack. You could tuck a big bag in the lower section and put a smaller bag up top.
I just completed a two up trip of about 2500 miles and fought with the luggage each morning and then had to keep adjusting it all day. The top bag and all the straps holding both bags to the bike and each other just pushed down on the bottom bag until it changed it's original position, and then the whole balancing act had to be started again.
I seem to recall a luggage rack that actually had two tiers of different sizes. Now it seems like a good idea.
Anyone know who makes this?