Tantrums off kickers

I've already had a post very similar to this one but I have a couple other questions. Ok, so I'm pretty consistent at tantrums now but I want them to look a lot better and have more style. I have a problem getting the straight backwards rotation, it's more to the side. Also, should I take a hard cut towards the kicker than when near the top open up with my arm slightly bent and push off the top off the kicker for pop while throwing my head back to start the rotation? Or should I wait till I'm completely off the kicker to start my flip? Sorry about all the questions but I want to make them look good as I may do a competition later this month.