Here is a new update for this part. The change is all in pcb, the pads are now smaller so you can stack these and run standard 24mil traces between pins and have it pass the default DRC rules.
and the new part. I have a set of boards using this layout coming, so I can make sure the pads work in practice. Assuming they do I will change the RPI-4B to use this and then add this as an option to the parts factory for making headers.
Raspberry-Pi-Header-40pin-improved.fzpz (14.8 KB)
I have left the original part (with longer thicker pads) available above as well so you can use the one that suits you best.
Peter