Hi Sandman,
J.A.T.O. Rockets attached to your board, should help with inversion and height

Failing that, a board with a bit more spring in the tail will probably help get you off the water. To get the inverted bit, try swinging your legs back a bit on releasing your edge a bit like a railey take off and use the swing momentum to help bring your legs up. Also best to wait till your at the apex so you ain't fighting the upward accellerational forces. At the peak there will be no more "up" which will make it easier.
Or I could be wrong

Nah, Stick with the J.A.T.O.'s

Good winds,