I believe that the hull of the German Electro-U Boats represents, by way of analogy, the braking magnet of the watt-hour meter. Thus, the secondary of Tesla's Special Generator would not get wound around the resonant cavity, the metallic globe, of the watt-hour meter, but around a mere portion of the braking magnet. Nor would the secondary get wound around the hull of the German Electro-U Boats for that is unnecessary. Magnetic fields get transferred all along any material which is capable of magnetic shielding (and hence, are also capable of magnetic absorption), so only a protrusion of the hull need extend into the interior of the Electro-U Boat and thence into Tesla's Special Generator. This is not unlike the armature of a watt-hour meter having protrusions extending inward from its circular shape upon which are wound the current and voltage coils around each protrusion. Needless to say, the braking magnet must also be demagnetized into a non-magnetic, but highly magnetizable, massive quantity of iron or other suitable magnetic shielding material. The hull of the German Electro-U Boats may have even been laminated just like the armature of a transformer core. The braking magnet absorbs energy from the spinning disk and thus acts like a sink-storage similar to Earth ground. If the braking magnet is not significantly enlarged in mass and demagnetized, then excess energy transferred from the spinning disk will wastefully be discarded out into surrounding space by both the disk and the braking magnet. The slowing of the disk verifies that energy is being absorbed by the braking magnet of the watt-hour meter. And the potential of the disk to accelerate its RPMs to infinity implies that the capacity of Tesla's Special Generator to generate an infinite quantity of energy is located in both the spinning disk and its so-called braking magnet remaining un-utilized all this time. The current coil, voltage coil, and spinning aluminum disk of the watt-hour meter correspond to the primary, secondary and toroid of conventional Tesla coils. The iron, or ferrite, core of a simply wound coil of wire corresponds to the primary of a Tesla coil, and the winding surrounding that iron core corresponds to the secondary of a Tesla coil. Thus, steps #1 and #2 listed below map directly, and functionally, to steps #4 and #5 listed below. The aluminum spinning disk of a watt-hour meter is a pivotal point around which a properly designed TSG is balanced around. Any lack of resonance to the entirety of all five parts to this system will immediately show up in a delicate act of imbalance put on by the spinning disk. Up until now, the toroid atop a standard Tesla coil has been correspondingly under-appreciated for its valuable contribution to that device since "center of load" may not be visibly, or immediately, apparent possibly because there are two other parts missing to a standard Tesla coil (listed as parts #4 and #5, below) which would have made it a functional TSG. The air surrounding the toroid of a Tesla coil corresponds to the braking magnet of the watt-hour meter, and to the hull of the German Electro-U Boats. This also corresponds to what constitutes the core of another wound coil, the secondary of the TSG. The TSG is a step up transformer of sorts, stepping up free energy -- the freedom to store as much energy as desired into the magnetic shielding material and then harvest out whatever quantity of energy is required to service a load making the magnetic shielding material (replacing the braking magnet) into a temporary electromagnetic-based capacitor absorbing excess electrostatic energy put out by the spinning aluminum disk of the watt-hour meter. The perforations of that spinning disk exhibit to me more than mere avoidance of warping, but the sharp edges of electrostatically enhanced discharge along the entire surface of the disk. Whether the spinning disk is replaced with a stationary or spinning toroid, I don't know. The Tesla coil, as we've come to know it, is an under-development of Tesla's full recognition of how to design a fully developed Tesla coil, namely: his Special Generator. And the watt-hour meter, as we've come to know it, is a diminished version of TSG with missing parts as you already am aware of. Just not in the manner of placement as you've described to me. Along this line of reasoning, it's not impossible to suppose that this five step process of: #1. a primary, followed by #2. a secondary, followed by #3. an aluminum something or other, followed by #4. an iron core, and lastly #5. another secondary to harvest to a load, ...could not be extended to further repetitions. But adding more repetitions, or ply, of all five parts to this system, or just parts #3, #1, and #2 (or in the alternative, parts: #3, #4 and #5), then the more difficult it would be to keep all of these numerous parts in resonance with one another.