Can someone tell me how to use this kind of stove ? Is it true that only works with metallic pots, since the top is flat, I must use flat bottom pots to get larger area of contact ? 0 V& I! d8 w4 R: L2 @: w8 R- p+ K9 Q 0 G! G& d( m( D5 GAlso what's the difference between current model of Malata Karaoke player compare with earlier models / p8 E: L9 M! W; r7 GThanks for help.