I had bought some single adjustable QA1's from a fellow board member quite some time back and actually put them on just yesterday. I used the factory bolts and nuts and did not need to get any additional things. I did have to grind down one side of the big washer that goes on the bottom stud so that it would not hit the body of the shock. The top mounts with two bolts and nuts and the bottom has a stud on the rear-end that the shock slides into and a big washer and nut holds that. You have to take the wheels off to get the old shock off and the new one on.
I started off on position 8 from 0 and it is definitely too harsh of a ride. I am going to turn it down probably another 3 and see how that works.
Regards,
Shev