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Is it possible to upgrade a Proto 2 engine to Proto3?   Can a Proto 3 sound file be downloaded to a 3v Proto 2 engine?   Thanks.

Yes, Protosound 2 can be upgraded to 3. The best way to do this is with a PS32 stacker board. In most cases this is a drop in replacement and MTH Parts & Sales can program the board before they send it to you.

No, Protosound 3 sound files can not be uploaded to a Protosound 2 board.

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