I had an rtb-500 on the back of my F4i last summer and had the bungee cords pull out of the hooks while running 80 in a back road in Colorado. The bag was trashed and I had to get a back pack to load what was left in the bag so that I could get home. I was not able to keep the bag and send it back to Riggs.
Take a good look at the bag you get.
Take a good look at the bag you get.