Then maybe you didn't read the article throughly. The limitation is not directly due to thickness of the audio jack, but to the depth of it which would have lim

Then maybe you didn't read the article throughly. The limitation is not directly due to thickness of the audio jack, but to the depth of it which would have limited the size of the heatsink. And if those 13.5mm are used to the brimm by the case, keyboard and PCB, then there's no 3.5mm+ of free space left for the jack. If you take a 3.5mm drill bit and start drilling in the sides of machine you're 100% gonna hit something critical. So yeah, Dell was right saying their tight packaging left no space for the jack.