jonathan stevenson was just 16 years old when he asked for benaud 's advice on left-handed leg spin .
his detailed reply says everything about the great man , ' mr stevenson , who is now a director at livewire sport , tweeted .
` your letter was timely because it was the first from a left-hander and it reminded me that there is a difference in coaching and not just in the fact that one youngster might bowl with the right hand and another with the left , ' benaud wrote .