I built a custom delta using 3, 1000 mm long C-Beam® Linear Rails and 3 C-Beam Gantry Sets. I had the bottom and top plates water jetted ( for accuracy ) out of 1/2 inch aluminum, from a design that I did in Fusion 360.

The X301 is a CoreXY 3D Printer that has a small footprint and a large 300x300x330 build area. The open style of this printer breaks the "Cube" mold of many other printers in this class but still retails rigidity and great performance.