First off, find an old clock with easily accessible gears - cheap, busted clocks can usually be found at antique shops, clock shops and thrift stores. Carefully take it apart until you have it stripped down to just the mechanical housing (minus the pendulum, if it has one). Unscrew the housing and make sure to be careful that the spring steel doesn't unwind out of control - believe me, it hurts! I used tape to bind it so that it wouldn't feed out of the mechanism. Once you have the spring steel jammed, turn the gears around to see which gears move which gears. After a little time moving the gears around, you should be able to figure out which gear combination leads from ONE of the spring steel coils to the post (the longest gear where the hands of the clock face attach). For this particular clock, only 3 gears were involved - the spring steel unit itself, an intermediate gear, and the gear with the post (where the hands of the clock face attach). Remove all the extra gears and the second coil of steel. Once you have the proper gears isolated, screw the housing back together, making sure that the spring steel is still jammed.