I got a P2 NV with the H4-3D included, and I'm ready to mount it. I watched a couple of install videos to make sure I know how to do it, and I see that one of them said to only use 2 of the clear plastic pins that go through the dampers, instead of using all 4. Is there a reason for this? Should I use all 4 anyway? Figured I ask before mounting.... Thanks!!!