I had to take some pics of my bike to show my GPR for another thread and thought I'd take a couple of the rear bag I use for tools and stuff. When I got my bike the stock bag was a mess, so I just took it off. I found this bag at Target, in the luggage section. It is a bathroom kit bag. It has several compartments, some that are waterproof. Plus some elastic loops for holding tools. The top outside pocket works great for my cell phone and wallet. I carry the tools you see, plus a spare tube and tire irons in it all the time. As a bonus in that picture you can see the smaller rear signals I got for $15 at Cycle Gear. The next picture show the bag open. The way I mounted it was with a 1/4" thick piece of tempered masonite (hardboard) the same size as the bag. It is stuck inside the bottom compartment and acts as a stiffener so the bag doesn't flop. I used the stock bag mounting bolts and go right into the normal mount holes on the S subframe. I covered the bolt heads with a few layers of duct tape so they don't rub the tube that is in that compartment.