Originally Posted by polarlyse
By going past vertical my thinking is that it gives it a greater circle to rotate within. Perhaps allowing it to grab a broader range of channels. I'm to techie but that's just my thinking.
As an engineer, I think not. If it rotates 360° horizontally anyway, then cranking it vertically to 95° is the same as cranking it vertically to 85°.
But, if you were to crank it open to 89°, almost but not quite vertical, then its own weight will make it try to sag down to the retracted position, putting a strain on the operating mechanism that has to hold it up. If you crank it open to 91°, just a little past vertical, then if it starts to sag, it will sag against the stops and stay open, with no strain on the operating mechanism. In other words, the extra little bit of over-travel is a hold-open device.