You probably want to ditch the zinger prop. Get an APC Electric or Xoar, or any one of the props designed for electric use. They have a thinner profile, more efficient airfoil and are much better suited to the profile of an electric power system. Your thrust will go up for a given amp draw, or you can get the same thrust at a lower amperage, either way is a win.
I am sure that you have realized that one of the pluses of electric power is that you do not have to worry about getting pusher props, just reverse two motor leads and and use a normal prop.