We were warned to be careful in the dyno cell because the fan can easily blow a person into the back wall or into the dyno rollers. There are lower pressure fans in the wall as well to aid with air exchange in the cell as well.
For reasons we could not figure out, our fuel cut came in at 8300 rpm instead of 8800, perhaps even with our precautions of locking in roll mode and using an AWD dyno the car was still pissed off. The power was still climbing at the fuel cut.
First Howard removes the rear bumper and taillights. This is really quite easy, just a few fasteners in the wheel well and in the corner of the lights and they come right out.
If you wondered why service on your late model 911 costs so much, its because you have to take off the bumper and taillights to change the air filter! The redeeming thing this is that the bumper and taillights are engineered to be easy to remove.