Would still need to explain how he could control the egghead machinery, is the scientist who created these automatas alive, some old man iirc?
You might be on to something, using these small robots to reprogram the sea beasts machines and add a command to follow Enel's orders to the Seraphims
Okay, so, here's a basic run down.
Vegapunk and Dr. Tsukimi were both born on Karakrui Island (Mechanical Island). This is the island Franky studied Vegapunk's technology on during the Time Skip. Dr. Tsukimi made the four automata that Enel met in his cover story, Enel's Great Space Operations.
However, Enel also met another group of automata on the moon, who, like the Seraphim, also had wings. All of these automata are around the same size as Edison, and Edison, the real man, was known for advancements in electricity.
Dr. Vegapunk and Dr. Tsuikimi were born on "Mechanical Island", and both learned how to make robots. Is that a coincidence? No.
Both of them learned how to make robots from moon/Lunarian technology. This is why Dr. Tsukimi's automata look like the Moon automata: Dr. Tsukimi (and Vegapunk) learned how to make cyborgs/automata from moon technology.
This means that Enel, who powered up the moon automata, now has the same knowledge regarding moon robots/technology that Vegapunk/Dr. Tsukimi did.
So, I believe Vegapunk modeled Edison after the Moon automata, and than Enel was able to hack Edison with his electricity, and control him, the same way Enel brough the moon automata back to life.
So, no traitors. Just Enel using his electricity to hack Punk Records, and Edison, which I think he's capable of, considering he constructed the Arc Maxim, which is both a spaceship and superweapon.