Rhyothemis triangularis in Wheel

I have been putting a lot of effort wanting to snap good pictures of wheel pair of Rhyothemis triangularis. I got my luck today to have a flying wheel pair of R. triagularis landed in front of my camera. It is quite difficult to take good picture of wheel pair of R. triangularis because the copulation time is so short - normally it last for less than 15 seconds. Furthermore, the female will appear from nowhere and the male will just grab her immediately. So, most of the time you would be caught by surprise with the wheel pair in front of you. By the time you have your camera ready, the wheel pair would have broken away...... really annoying.