I have done a slighty corked 5 before, As soon as I hit the jump I looked at the take off and threw my shoulder down, I landed but almost ate shit, this year I want to learn a corked 7 but I don't want to fuck up and get hurt, could I get some advice from the more experienced ones on how to do them? Oh and how big should I go? i did the cork 5 off about a 20 ft table.