Some ideas:
- 
Visualise it happening first so you’ve structured the very concept of it, and/or banish the possibility of failure 
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Get a list of people who are willing to make a small sacrifice of some kind to the spirit to request they appear, so it’s not just one peron’s working but part of many people’s “reality tunnels” - ask for PMs then form the circle afterwards to avoid this 
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Do it as part of this? Group Working : Samhain Ritual Monday 6th November (if so, someone needs to double-check that time calculation) 
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Have a male and female magician working at the same time, I can’t find the link but I read that some experiments in various mental powers work best that way, it’s very traditional (even in ancient Hindu India, the householder and his wife tend the flame, this isn’t a feminist modern-day concept) 
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Consecrate the camera to cast out all forces of the kind of everyday, clockwork, “forces of law” that hold back physical manifestation 
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Ask the spirit to give you a familiar spirit to inhabit the camera and aid in this undertaking.