OK, from your note about where you bought these (having myself bought from Simon) I figure these are what you are referring to, the Yeil M&C Magnetic Levitation Devices:
http://mcv-consulting.com/cart/magnetic-levitation-devices-p-189.html
Anyone else try them?
http://mcv-consulting.com/cart/magnetic-levitation-devices-p-189.html
Anyone else try them?