Spare pair of Zoot 3″ arms. This is the lightweight 3″ arm, using these arms over the heavy duty 3″ arm will save you 10g. This is the better option for micro racing as they are very easily swapped over. This is also a better option for general flying if you dont plan on deliberately putting your Zoot in danger.
2x 2mm thick carbon fibre Zoot 3″ arms.