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 ? , \2 n7 L$ C. k# O) Z8 |6 b! U ' y H5 Q6 R5 o* z- ^" \* }8 xAlso what's the difference between current model of Malata Karaoke player compare with earlier models 7 D2 O- \# \( ?* R. c9 f% dThanks for help.