Using your HO Scale Brass Oriental Limited EMD GP20 model is easy. Just connect it to an analog - DC power source and watch it run smoothly on your tracks. When handling the model, be careful as some side handrails are a bit loose. Don't tug on them too hard. For maintenance, keep the model clean and free from dust. You can use a soft brush to gently clean it. Store it in the original box and foam when not in use to protect it from damage. If you notice any issues with the motor or gearbox noise getting worse, it might be a good idea to check with a professional. Enjoy your model train!