Hi, Agreed, if you are doing things no one has products of then 3D printing or casting is really your only alternative. By no means was I trying to argue. However I was a little miffed at IndyCals price from resin to 3D printed. They did mention that there cast parts were from Lance Sellers who God rest his soul is no longer with us. But it's double from cast to printed. In the case of an every day Chebby engine, 3D printing makes little sense. But in the way of custom parts like what you do, then it's the only alternative unless you can cast. Using the Indycals stone tires for $47 as an example, well that's the price of a superb styrene kit and the stone tires are by no means something special or a must have. And most importantly, no disrespect intended towards you. We are all builders and get our parts from where and whom ever we can.