These are Stacker Plates for the Keshe Magrav Power Unit. Print one top and two centre and bottom plates as well as a set of feet to form the three level stack. UPDATE: The Magrav Blueprint does not stipulate the size of the GANS ball. If the rest of the design is in line with the Blueprint, it allows for a ball with a diameter of about 20mm.Version 5 has a GANS ball of 20mm and each layer has a height of 2,5cm exactly in line with the Blueprint and should stack perfectly.If you prefer the larger GANS ball of 40mm - ping-pong ball size, then use the V4 files which should stack taller.Important: Ensure the inner coil has 81 turns, with a 1mm gap between each turn and the outer coil has 144 turns with a 1mm gap between each turn.Use cable-ties to keep everything in place if required. All the parts can be glued together to finalize the assembly.Please consult the Keshe Foundation Website and the Magrav Blueprints for more information on making the coils and the GANS.