Thanks Gecko, good photos. You describe what I'm trying to accomplish - similar to your first photo. On my FLSTC the luggage rack is attached to the passenger backrest/sissy bar (not on detachable side plates) but it bolts on/off as one unit.
On the FLHRSE the "stock" passenger sissy bar & backrest are the "short" style with small backrest. Assuming I find a compatible luggage rack, the backrest is not tall enough stablize the luggage bag - pad too small and too low. What I'm hoping to discover is a combination luggage rack and replacement sissy bar/backrest compatible to the docking points on the FLHRSE so I can install and remove the luggage rack/backrest as one unit fairly quickly and not leave a bunch of added mounting hardware on the fender (it defeats the purpose of replacing the original seat with a solo seat to streamline the rear fender.)
I'll show your photo to the talking heads at the Harley shop. The "detachable two-up" luggage rack (E) on page 391 of the Accessories catalog may work. It's listed as compatible with the FLHRC; maybe??
thank,
DS