No Mayflash does not support the 3d stick.
There is only one adapter that works with a 3d stick. Bliss-boxcheck out my link. A single sega adapter is not much. PM if you need pricing. Here is prof. http://www.racketboy.com/forum/viewtopic.php?t=18231


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check out my link. A single sega adapter is not much. PM if you need pricing. Here is prof. 
