Thank you nicksak.
Yes, I will order more components and build some extra cartridges. But, i will not propose them at pre-order ; I will wait t to be sure they works correctly before to sold them. 
Although it's not Christmas it's getting close to the feeling receiving this great product and playing Meits Disxmas songs on it 
In fact, is there anywhere an (almost) complete list of Moonsound compatible software?. I already known the classic Bombaman and a pile of music demos; but that's all...
Im'm thinking in Xtazy maybe; but it's a demo game 
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