Box has now some rear legs to permit to do not install it vertically on the fans.

The bottom has been replaced by a CNC milled aluminium plate, which acts as a heatsink for the Pi4, which is now upside down, with thermal contact of the chip to the aluminium plate, by the mean of an aluminium block.

External DC connectors are reduced to only one connector, which acts as a DC in PSU, charging port for battery back. new wiring diagram for the setup, which is simpler

USB GPS dongle has been tested to work well on V1, even it's installed inside the box. The signal is still well received by the dongle, so it's not planned to change