Frequently Asked Questions About Our Products Can I Order Demo Derby Parts Over the Phone? Yes, you can order demo derby parts over the phone (317) 650-5074. How Do I Assemble My Wheel Modifier? There is an instructional video on this website: indycnc.com. If I Preorder Demo Derby Parts, What Information Do I Need for Pickup? Just your name is all that is required to pick up preordered demo derby parts. If I Order Demo Derby Parts, How Long Before They Ship? Most demo derby parts will ship within 5 days. Longer on painted or special parts.