Who knows where Stanley's device is, hard saying. I will say me and many other youtubers started experimenting in our garages around 2005 as the price of gas was almost $5 gal. because of the gulf war. Me and my personal neighbors friends started to experiment with hydrogen production, magnet motors and any other viable ideas on how to harness free energy. I can tell you its real. It took me months to understand what exactly is happening, especially with the magnet motors that work off repelling south pole arranged magnets. I can tell you that after playing with magnets for three years, we are not really taught what a magnet really is. They don't wear out in one of these devices, they keep spinning, and if built right will accelerate and keep accelerating faster and faster until it comes apart. They actually need to be governed, or a load placed upon them. I will say there is a thousand ways to do this, and thousand ways to "harness the field" that is all around us. Perpetual motion is impossible, so the energy has to come from somewhere ,it does, its all around us. The secret to understanding a magnet is that it is a quantum lens. Many materials can be made into a magnet, they have made plastic magnets and magnets of various materials you wouldn't think possible. Its the arrangement of atoms in that material that allow that material to harness the field. Magnets are stronger or weaker depending where you are on the planet. Magnets are stronger underwater etc. along with many other weird facts about there properties we are just not taught in school.
There are dozens of videos on these devices, most over ten years old. Why is it these guys end up dead or make a deal with the military? Its been militarized, weaponized. Imagine a military that don't rely on fuel or never runs out energy to power weapons that spit bullets, ie. rail gun and laser blast.
Warning: If you do experiment and achieve over unity, don't go public in a big way. Bad things will happen.
Stanley Meyers device.
Salt water to easy plasma
Perendev magnet motor