proper core power comes from 3 elements ....crunch of abdominals, rotation of torso and side bend of obliques ...the abdominal crunch sees the naval being sucked inward which activates this power center
TRY THIS ...use your left oblique to pull the right hip .....not the right oblique to push the right hip ...see if this improves shot ...I concern the right oblique push may stick out right hip and send club over the top
the added benefit of the crunch move is that it delivers the "shift left" ...this is key to moving the swing plane fwd 2-3" and hitting ball first / turf 2nd
use the fleshy part of the right palm under the pinky to push outward and rightward thru impact .....right shoulder get closer to the ball in the DS - not farther away ...Left hand is palm up thru impact... Simply focusing mental energy on the glutes will help to engage them and "demote" the shoulders as key the power source