Using the Bambu Lab Electric Coffee WDT Tool Kit is easy. First, visit the BooKoo Coffee Electric WDT on Makerworld to download the model files and then 3D print the necessary parts. Assemble all the non - 3D printed parts included in the kit with the printed ones. When handling the needles, remember they are sharp. Before using the tool, sterilize the stainless - steel needles again to ensure food safety. The kit is compatible with most 2 - ear 58mm coffee portafilters, but make sure the ear width is within 30mm. For maintenance, keep the parts clean and dry. If you notice any loose screws, tighten them properly. Store the kit in a cool and dry place when not in use.