Using these Gemfan Hurricane 3630-3 props is easy. First, make sure your motor is the recommended 2004 model. Then, attach the props using the T mount & M5. When flying, keep in mind the performance characteristics of these 3.5 - inch 3 - blade props. As for maintenance, after each use, check for any signs of damage. If there are scratches or chips, especially on the blades, it's best to replace the prop to ensure safe operation. Store the props in a cool, dry place to avoid any warping of the PC material. Also, be careful when handling them to prevent accidental bending or breaking.