Yeah, so I was building again and this is what I came up with for motovlogging with a modular helmet:
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I've made the coiled wire myself, but I still need some wire clips to keep it from flapping at 200km/h.
Weight is OK, balanced, as it should be. The Anker weighs around the same as all the other things

Everything is mounted with double sided tape, but I've made my own mounting plates with thermoformed plexiglass and sugru. They stick so good, and the fitment is nearly perfect