ASM/Euroreef skimmer setup

[Delphinus]

I picked up an ASM G1 skimmer and put a Sedra3500 on it. Buncha questions -

1. The pipe going from the pump to the skimmer looks like 3/4" PVC should fit. How far in should it extend? To the centre of the chamber, or just to the edge?
   
2. Should the end of the pipe be angled to get a swirl or anything like that, or will just a flat/straight end suffice?
   
3. I have a high water level in my sump. The water goes up to the top of the chamber. How much should the skimmer be raised? I'm gonna guess about 4". Sound OK?
   
4. How much higher from the sump level should the water exit the skimmer? If I have it at the water, it releases a LOT of bubbles into the sump which then get into the main tank.
   
5. Is there any reason I couldn't have a pipe attached to the skimmer output so I could plumb the whitewater back through the baffles?

Any help or advice appreciated. Thanks!