Hi, I am fairly new to this forum and a beginner in badminton. I have not had the opportunity to use the following rackets but observed that "doubles" rackets like MP99 and AT800 have shorter shafts and longer handles as compared to "singles" rackets like AT700. Does the shorter shafts help in swing speeds and thus more relevant for doubles play? How does a longer handle help? I have done a search but could not get any specific answers.