I've been fence riding for two years now on whether to treat myself to an induction cook top. The problem? Well, I really don't want to give up all of my copper pots and pans. So a question for those of you who use induction... Seems logical to me that putting a cast iron trivet over the induction burner and putting my copper pots and pans on top of that should work to cook something! But... I don't know if that would harm the ceramic cook top surface, or even it it would be very energy efficient, and after all, energy efficiency is the whole reason I'm interested in induction cooking. Any thoughts? Thanks.