I think most of you already know this, but if not, I will mention this, as it is something very obvious and interesting.

As we all know, Walter spoke with Tesla about his theories. And as it seemed, they really impressed Tesla. Unfortunately nothing much is known of the late Tesla, except a few mentions by Tesla himself.
He said once in a letter to a friend, that he should not be to much amazed if he will fly to him in a vehicle, where you would never guess it could fly, when you see it standing on the earth, that it would rather look just like an iron stove.
He also mentioned to a newspaper, that he invented the perfect flying device, which doesn't need any propellers or wings.
He also mentioned shortly before his death, that he now finally has found the ulimate theory, which explains what gravity is.
I personally think all these efforts were actually, because Tesla now used the cosmogony of Walter.
Later on it is known, that the young Otis Carr worked in the hotel, where Tesla lived. He brought Tesla daily the nuts for feeding the pidgeons on the balcony. They got friends, and as Tesla knew, he would not live forever, he passed all his knowledge to Carr.
Carr later on produced flying saucers with the knowledge he got from Tesla. And if you read the explanations from Carr, how these work, you will immediately recognize the wordings of Walter. Carr used exactly the same words, for the same things, as Walter did mention them in The Universal One. So this actually means, Tesla used them too, which actually indicates, that Tesla got this from Walter. Otherwise this would be some very strange coincidences...

And if you now look at how he built his flying saucer, you immediately recognize Walters work.

Some time before the German Carl Schappeller got his own theory about how things work. And the funny thing is, this is actually about exactly the same, as what Walter is saying! He only uses a completely different wording for the same things (so it's unlikely he knew Walters work). You also recognize, that he didn't get as a complete picture as Walter had, but for a "simple man" on its own this is rather amazing...
And Schappeller also developed a device to get free energy, or to drive with this an "ether ship" as he called it. And guess what, this looks also almost exactly like the Carr device, which is a Walter device...
The only difference is, that Schappeller made his coils spherical and not conical, like Carr and Walter. This also indicates, he didn't knew Dr's work.

So all these persons actually proclaimed the same circuit for generating Free-Energy. The only difference was, that Dr made a bit the lazy man approach, by saying, I don't mind if it is not directly self sustaining, as long as it produces much more energy than needed, one could take a turbine and make it self sustaining...Carr and Schappeller made them directly self sustaining, but this actually meant, to quite complicate the circuit. So I think for the home power plant, as to what Dr emphasized to use this (HSC), Dr's approach would be much more economic to produce...

Addition:
I forgot to mention, that it is quite funny, that the different people used the different features, which Dr described:
* Dr used the feature of resistance to compression, by inserting a metal in the anode core, so that this will heat up to incandescence. So he created heat.
* Schappeller used the fact, that the planets will revolve around the sun. Even if you stop them, they will immediately again start to turn. So he used this motive power which his artificial sun (he called it stator) created on the artificial planet(s) (he called them rotors) to use as power. He calculated, that a stator of 15cm diameter would theoretically be able to deliver 36'000HP, but in practical reality one would have to limit the number to about 9'000HP. (Quite tremendous values, for a 15cm stator sphere...)
* Carr used three effects: He used the motive power as Schappeller did, but he also used mainly the regeneration power of the "planets", to get more electric power out, than needed for the central core (artificial sun). He also said, that a downgraded version of his "saucer engine" will be perfect as a home power plant. (Well as Carr was Tesla's disciple, it's no big surprise that Carr focused on the electric features...)
And as third effect he used the fact, that negative discharge repels and that objects seek like pressure conditions, to actually get his device to levitate.