[Martee]

I am not sure that the intent of the Weighted club was to make a full speed swing.

Both types of swing use the same arm muscles and this is one area a weighted club works. Also the weight will stretch out the body which is needed for both.

I would think it works equally as well for either swing style so long as it isn't abused.

Regarding feel, I am sure having an unbalanced club (the donut) does in fact give the swinger a heighten sense but I am not sure that this couldn't be a false sense if the stroke was off plane, etc. and you wouldn't know it.

Swinging with two clubs does seem to work for most to loosen up without exceeding the weight the body can adequately handle, even at full speed.