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 ? * v7 b6 R9 Y: X+ K" G* D + a% }) V) U' y3 gAlso what's the difference between current model of Malata Karaoke player compare with earlier models + P4 [- G. g7 D" O/ RThanks for help.