Using this T-Motor F7 HD Stack is easy. First, connect the F7 HD FC with the F55A PRO II ESC following the plug-and-play design. Make sure it's properly attached to support the DJI FPV Air Unit. When using it for your 5'-7' freestyle, long-range or cinematic drones (X4), ensure all connections are secure. As for maintenance, keep it clean from dust and debris. Check the connections regularly to make sure they're still tight. If you notice any issues, such as poor performance, check the power supply and the ESC settings. And remember, this stack is designed for specific drone types, so use it accordingly.