You`re probably right, Greg (Willis, not Norman) has mailed me to ask what my body position is at impact and I suspect it`s nowhere near rotated enough.
As for the "secret", it`ll take more than that to stop 20 years of swatting - it`s just not that difficult to bend your wrist with it on, perhaps I should replace the elastic with something a bit less flexible and then I`d have to break my index finger to swat with it.