One of the goals in this project is versatile options for construction. Using a prebuilt frame works fine however a F550 frame to work with is not always available and tensions with China make getting cheap clones or even genuine parts harder and harder. At times taking weeks to get here in the USA and even more difficult in other parts of the world.  Also I am taking into consideration that other places in the world like Sri Lanka for example may have trouble getting parts imported in, so 3D printing has become even more popular as an alternative. I have included a Top Plate F550 replacement where the holes line up. I am testing a 1mm thick and 2mm thick part. They are printing right now. I have not modeled a lower plate for the frame yet, but it will be coming.