Cover for Raspberry Pi 40-pin GPIO Connector - UART pins exposed - GND and Pin1 indicators

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4782916.

Based on https://www.thingiverse.com/thing:1874648 but fully rebuilt (because of model artifacts I could not get rid of as easily as rebuilding)

This 40-pin GPIO cover is based on the dimensions of the source thing.

The remix is:

• 4 pins exposed: pins 8, 10, 12 and 14, for use a UART on pins 8, 10 and 14.
• Ground indicator, for plugin in the UART cable correctly
• Pin1 indicator, so I don't accidentally place wrong side. (as if ;) )

Some people asked me; "why a 4-pin connector on 8, 10(, 12) and 14 while pin 6 is ground as well? could have used a 3-pin connector on 6-10". My answer is; because now I still have the option of either using or providing 5v from or to the Pi on pins 4 and 6.