Yup, it's a short. Thanks for the continuity help, that's a super useful tool!
Is there a place with those shown? They aren't on the six layer expansion guide from what I can see.
Also, I think I'm going to sand the board some more. Pictured in blue is the edge that I think could use more sanding, seeing ass I have a bit of wiggle room left. I think I stopped sanding when the board got flush with the video port, but in reality it looks like you're supposed to sand further.
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Also, would half pads be causing issues? My sanding job cut some in half (examples are pictured in red) and I was wondering if those might be this issue.
@Shank said that there's a little wiggle room with the trim, but I'm already cutting it pretty close on the red edge, so I don't want to sand that part anymore unless there's likely an issue there.
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If you have any other suggestions, I'd be happy to hear them!
Thanks for all the quick help tonight, it makes this a whole lot easier.