[EdZ]

Thanks Yoda I can appreciate the distinction you are making but Edz said ‘you can obtain the imperatives without maintaining both wedges’. Must both wedges be maintained or only one?

Ideally, both are maintained for the most efficient impact support.

The point was that you 'could' obtain the imperatives (and not keep both wedges) and still hit a good shot (left hand only, right hand only as the extreme examples) - just not as well supported as if you had both wedges in place. The alignments are the same for the wedges, hitting or swinging, but how they are moved is different.