G'day OCAUers. I need a bit of help from the experts please. RE: Project MkII Colonial Viper. I have to drive five aluminium and plywood turbine fans about 600 mm in diameter each, using five separate electric motors, for periods of time. Slow enough that they don't blur beyond visibility and that they don't become dangerous to spectators. I'm thinking 60 to 80 rpm would be fast enough to provide the effect, without becoming dangerous. I have 240 V mains power plugged into the project, with multiple opportunities to plug in 12V adaptors. Problem. A friend has given me some garage door closers. Unfortunately they are all different. Different amps, different shafts, worms and gears. Might just be better off buying a batch of motors all the same. Searching Jaycar and the web now. Not really sure what to get though. Baz.