Using this Bambu Lab TH Board Set V9 is straightforward. First, make sure you've correctly identified the versions of your micro lidar and TH board to avoid compatibility problems. If your Micro Lidar SN starts with 00ExxB, get a dual red version TH board with a serial number starting with 003xxC, 003xxD, or 003xxY. For a Micro Lidar SN starting with 00ExxA, go for a single red version TH board with a serial number starting with 003xxA or 003xxB. When installing, follow the standard procedures for your printer's toolhead. As for maintenance, keep the boards clean and free from dust. Check the cables regularly to ensure they're properly connected. If you have any questions, refer to the Bambu Lab Wiki for detailed replacement instructions.