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Great for PC screws and such.
The people that say the design is dangerous need a signed slip from their parents to continue as they think this is an unsafe site. Hee Hee Hee
Great Project with a potential awesome gift.
I used a old 35mm Zenit Camera. You need a tripod, Kodak or Fuji asa 100, use the bulb setting or with this camera you can lock the shutter open with the older T setting. Point is no camera movement. Set camera at f11-16, focus infinity, line up first burst. After that, use a piece of black cardboard cut like a index card as a shutter by opening the shutter with hand held carboard in front of lens. Move (or open) for exposure of 4-5 seconds during boost, put index card over lens (it doesn't need to be tight), then setup for next exposure.