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Just get one of these if you want something different..
don't want (nor should I ) to spend your money..
you shouldn't be having this issue..
Your 3x 7 array is still fine
Rapid's board has a jumperable pull down resistor so it's easier to trouble shoot issues..
PS is plenty big enough..and w/ LDD's no issues w/ voltage mis-matches as w/ Steves..
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