Using this rail car kit is easy. First, carefully open the sealed part bags following the assembly diagram included. Take your time to assemble each piece step by step. Since it's an analog DC - only control kit, make sure you have the right power source. When handling the brass parts, be gentle as they can be a bit fragile. For maintenance, keep the kit in a dry and clean place to prevent further tarnishing. If you notice any loose parts during assembly, you can use appropriate glue to fix them. Remember, if you're not satisfied with your purchase, you can return it within 30 days for a full refund, but you'll be responsible for the return shipping costs unless the item arrives damaged.