Yoda,
Please tell us more about half swing bunker shots.
Don't want this to deteriorate into a threadjack, but in addition to the information above . . .
1. Use a slightly Open Plane Line, i.e., a Line slightly left of the Target Line;
2. Use a Stance Line either parallel or just slightly Open to the Open Plane Line.
3. Open the clubface and aim it down the Target Line;
4. Grip the club firmly;
5. Set the Pivot Center (head) and weight slightly left (toward target) to encourage a steep Angle of Attack, but maintain a vertical shaft (little or no forward lean);
6. During the Stroke, minimize hand action and emphasize arm and pivot action. Think "up and down" (V-shaped swing), not "back and forth" (U-shaped swing);
7. Through Impact, trace the Open Plane Line with the Right Forearm and #3 Pressure Point.