While waiting for the store to restock GC+ I decided to build a few. I have tested everything with a multimeter and didn't find any shorts. (I know in the 2nd image, 2 of the vias on the left look connected but according to my multimeter they are fine, maybe just the solder mask is messed up) And it looks like I flashed the chip correctly. I wired enough just to test the A button. When I plug this into the GameCube adapter for the Switch (playing Smash Bros Ultimate) and connect A to GND, there is no input. I have not had any luck on the 3 other I tested as well.