Forward Stroke

I know that a forward stroke needs to be efficient to minimize injury and to maximize energy.  When using the Greenland paddle, the wrists should remain low (under the shoulder height), most of the paddle blade should sweep through the water, the body should face the direction of the paddler wants to go, 

I'm not sure when the blade should leave the water.  I think it leaves the water later than with a Euro paddle but I might have that mixed up.  

The torso twists (abs crunch) with every stroke - I don't do this unless I'm thinking about it.

These two videos are of my forward stroke.