Hot, humid air is less dense than cooler, drier air. This can allow a golf ball to fly through the air with greater ease, as there won't be as much resistance on the ball.
It's not self-adjusting. The only thing I had to fiddle with is position to get the belt to track correctly. The teeth are on the tensioner to hold it in position while you tighten the nut on the back of it so you don't have to hold it AND tighten it at the same time.
This thing is the cats ass. It's the coolest thing on my car. It's the only thing that currently works. I'd love to have a shot at it so I could give it as a gift to a very near and dear buddy of mine. Since he's not a STF'er, screw him. One of you deserve it more.
I'm in, but getting that on a T4 might be a bit of a challenge
Addendum to Newtons first law:
zero vehicles on jackstands, square gets a fresh 090 and 1911, cabby gets a blower.
EZ3.6 Vanagon after that.(mounted, needs everything finished) then Creamsicle.