[Mathew]

Can somebody please explain to me how to swing with only the left arm ?

I think it was Mathew who suggested this was important for swinging but I just can't seem to get it. I have no control of the club when trying this. Is the left thumb used for pressure behind the shaft ?

In the Tom Tomasello correspondance video he shows this motion of the left arm with an almost acquired motion and it looks so efforltess. I have also tried the double overlap with some success.

It is a good thing to do this as it can teach you many things.

Basically if you can't hit the ball in the general direction that you want with each hand seperately, you are very unlikely to be able to do it with both.... The best advantage I have found of doing this though is that it teaches you to maintain the left flying wedge, the awareness of the hinge action and swivels. It also makes you keep the left wrist flat - you will hit it like crap without the right hand skillfully throwing if you disrupt the orbit. You will also work out that it is not left arm power either but pp4 that pushes against the primary lever assembly to drive it into impact.