Can't get gun to work -- sensor bar works, but I can't "fire" ?
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 Hi! I'm using the usb guns that came with my Arcade Guys cabinet ... I am able to get the cursor to move around, but I can't get the guns to actually fire -- is the mapping done within the recalbox controller config, or within tetrarch settings? EDIT: In the Retroarch settings, I am not able to map gun start or gun select to any of the gun buttons, it shows "mouse 1" next to gun start ....? 
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