Swivel first stage

[frogxman]

What is the right way to position a swivel(turret) first stage - pointing up or down?
I've seen both ways, and personally (I have a Beuchat VX4 swivel 1st stage) I position it ponting down. Is there an advantage of doing that in the opposite way?

 

[ElectricZombie]

Turret pointing down.

Some have the turret upside down, claiming that it allows them more freedom of movement since the swivel is now on top. I don't buy that at all. I does not offer any more range of movement and exposes the turret to collision damage...not a good idea.