I bough a used 1100, and it came with a corbin that included a bolt on back rest ( for the passenger). if you're not familiar with the 1100....right behind the passenger seat is body plastics and the upper bolt locations for the handholds. I took out the org. hand hold bolts (4 of 'em) and made a smallish luggage rack out of 3/16" aluminum finish size is 8" wide X 3.5" deep- you could make it bigger, but what's the point when this works fine? besides I don't like the idea of getting too much weight beyond the rear axel point.replaced the bolts with longer s.s. ones and rebolted. this plate has no "lash down points". I usually carry a w.p. stuff sack on it( aprox16" dia X 24" long. it sits comfortably on the plate and is lashed to the seat back rest.... the plate just keeps any luggage off the plastics. I didn't want to drill the 1/2" square metal support of the seat back support for fear of comprising the safety of the back seater- on trips where I'm carrying max load I also tie a Sealine portage pack,70L -also lashed to the forward side of the same seat back and sitting on the passenger seat (also doubles as a back rest for the pilot). it all makes a pretty flexable set up....something that a top box, just doesn't offer. hope this helps ya
