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 ? # `% ^/ Q* u- Q 6 P" g1 i* W4 eAlso what's the difference between current model of Malata Karaoke player compare with earlier models 8 H& u' N/ E+ `9 ?Thanks for help.