I just bought a refurb 2018 13" MBPt (i7 16GB 512), then saw Louis Rossman talking on YT about a serious design flaw to the graphics chip, which places a high voltage (backlight) pin directly next to a data line connected to the main CPU. Any voltage jump from the 40-50V line doesn't get siphoned off to ground, but instead could fry something else in the chain. He says the flaw has been in the design since the Touch Bar line was introduced. Has anyone heard stories about this happening? Obviously Rossman has seen several machines come through his shop that have suffered from this ill design. He indicates that prior to 2016 the chip in MBP had proper separation of high voltage lines from sensitive data lines. I'm reconsidering my purchase and considering returning it during the extended holiday period. I went through the 2011 graphic board failure with several machines to want a repeat bad experience with the new line.