Got one for my SG. Using the TBag Tour Pak Bra also....I got the chopped tour pak bag, 2" shorter but $100 cheaper....I haven't used the bag yet but I put it on the pak today and once you secure it to the bra clips, it's solid and not moving...
Motorcycle Super Store has the best prices...Buy the bra and bag separate if your going that route because the price is cheaper then buying it as a package deal.
I have the Tbags bootcase and use it on my 09 ultra. I was hesitant to spend that much on a bag but I'm very happy with it. The velcro straps hold the bag very securely to the luggage rack and the rain cover is nice also. Also fits very well inside the tourpak also. Very well made.
I have the space saver, which is just .1 cubic feet smaller and it works really well, especially with some net bungee straps to hold leathers on top. Its alot cheaper for those a little bit more budget minded. $89. It has work really well for me and I like that It still folds up small and tucks away when I dont need the extra space but always have it for when I do it.