Ok, new to the 600f4. I came from the 60-600 sigma sport. When I drove the back roads, I just had it laying in my lap. I drive a Ford truck and the center console lifts back. With this f4 laying in my lap and the lens points towards the window so I can be quick to get the shot if need be but I do not have much room between me and the steering wheel. It works but it sometimes puts pressure on the steering wheel which could be bad. I have my wife with me most of the time as she enjoys wildlife so the whole seat isn't available a lot of the time. I am wondering what some of you guys have come up with? If I lay it up on my center console when down, it isn't stable and can roll side to side.


