subject should have been Projector question, oops

I assume people are using Short Throw projectors because with someone standing in the middle of the room swinging a club it has the potential to block out the projection. My room is 152 inches by 209 inches, and it's 118 inches high (12'x17' w/9.8' ceiling). I plan to put the impact screen on the 152 inch wall, which means I have about 15' of space for the projector if needed. Has anyone ceiling mounted a projector behind the hitting area with 10' ceilings and not had issues with the golfer blocking the image?

Is there something that simulates the light beam from the projector to give an idea of how much clearance one needs to get the image to the screen?

I was looking at the BenQ W1070, any other suggestions? The simulator is a GC2 if that matters.