i respectfully disagree. many people throw their corks differently and i, for one, find corks on trampolines to be far different from what i throw on snow.
i've taught the trick to several people before... but always in person. i'm gonna do my best to explain over the interwebs.
first step - learn 7s. you might even find that you start slightly corking them after a while.
second step - accept that you'll be throwing your body off axis. i can't tell you how many people i've seen hucking as hard as they can to throw a cork, but at the same time resisting to going off axis. imagine your left shoulder dropping down behind your back and your feet getting kicked up into the air. one pointer that has helped so many people i've taught is to envision the outside of your right foot going out to kick a soccer ball.
at 180, you'll be "laying in bed" in the air... that is to say that your body will be perpendicular to the deck (stomache down) and the top of your head will be pointing toward the lip of the jump. for some people, i've only needed to explain that position and they immediately understood.
once you get to 360, you have the option of going back on axis quickly or bringing it around with more of a flippy style. if you do it really well, the last 360 almost looks like a flatspin. to do this, bring your knees up into your chest and don't resist the rotation you've already set yourself into. if you extend before this last 360 you'll end up back on axis much more quickly. i find that doing so leads to backseat landings... so tuck those knees up and get the full cork 7!
third step - go for it. seriously. it's very much a mental trick. as long as you can envision it happening, you'll likely stomp it. to this day, i really cant explain the mechanics in coming back on axis after going off axis, but i've truthfully never seen someone have trouble bringing it back on axis (bar backseat landings).
if you've got any more questions feel free to reply or PM me