Options for Projector Placement

I generally do not recommend mounting the projector to the enclosure.   As the golf balls impact the screen, there will be some vibration.   When the projector is out on a moment arm as shown in the picture below, it will oscillate slightly after each impact.  The oscillation of the projector may be small, but it will be amplified (and visible) as the projected image moves on the screen.   We consider it an unwanted distraction.

That leaves two options.   Place the projector on the floor in front of the screen, and protect it with a projector shield.   The shield protects it from golf ball impact.  Picture below.   This has the psychological impact on the golfer who often worries about hitting the projector.  In some cases, a low ball will hit the protective housing.

That leaves mounting the projector to the ceiling and suspending it down until the projector is at a height just below the top of the enclosure.  This is more effort to set up initially, but will give you the best quality experience over time.  No vibration.   The projector is up out of the way without the risk of ball impact.

We have many sims where we use a 1 1/2" diameter pipe with a flange to mount to the ceiling and then another flange to mount to the projector mount.    The length of the pipe would be determined based on the ceiling height and your preferred height of the projector.  These pipes can be found at outlets, such as Home Depot, and cut to your preferred length.   

Here are a couple of sample photos showing a projector suspended from a 15-foot-tall ceiling.

The flanges are attached to threads on the pipe.  One is |attache to the ceiling, and the other is attached to the projector mount.