Ammeter to Voltmeter...who does it?

OK.

I got my Sunpro voltmeter and tore it apart. I have it down to the mechanics of the gauge and want more info on what I need to do to the ammeter to prep it and what parts I use off the voltmeter. Do you have some pics or a detailed explanation? I hate to tear into the ammeter without some direction but I will do so if I cant get an answer.

Thanks in advance.

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