^^^ Schweeeet! I may do this, but I may create an even smaller hole, and then use one of those "BMW" tennis balls as a plug, or do you have a better idea? I've been adjusting rear rebound by letting the rear seat down (not removing the liner), but it's still a PITA.
Also, when I first installed these (when everything was clean), I found just stickin' a realllllly flat head screwdriver between chasis and the spring mount will cause it to have ~more~ friction than the spring collar, so I ~could~ turn the spring collar.
Now that everything's nice and dirty, I just clean the threads and collar well, and the dirt between the spring mount and chasis provides the friction needed to prevent it from spinning.