This is my home made top. I followed the Fleet Museum's directions from here:
http://fleetsciencecenter.wordpress.com/2008/12/05/this-months-experiment/
I used a sour cream tub lid and a chopped up bamboo skewer. I didn't need any weights. The first time it only went for a little while, but then I was able to get it to go about 20 seconds!
(There's no sound because my housemates were jabberin' the whole time!)
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