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 ? 8 _$ i/ ^) b+ u; V1 O: a$ D / T1 L D2 z$ I1 N8 q# lAlso what's the difference between current model of Malata Karaoke player compare with earlier models 3 [! ?6 l# N1 v2 {+ KThanks for help.