Ok, got my Stealth 2000 this morning and there's a massive scope on the top with loads of bells and whistles on, problem it I don't know what they do (apart from the switch and the focus ring) soooo....

What does the rotating eyepiece do?
What does the knob in the middle (on top) do?
What does the knob in the middle (on the side) do?

I can guess the last ones are for helping you to make holes in what you're pointing at.

Also, can anyone explain the markings on the reticle? It's not a Mil Dot, it's the other sort.

If this has been done already then if someone can point me to the thread I'll have a read, I would have done a search but not being familiar with the tech terms yet, it would have been tricky.

One last thing, is it normal to get a little puff of air from the breech when a rifle is fired or does it need new O ring?

Ta