Excellent idea. I don't have the Indi Dev experience to contribute but a couple of ideas on the hardware:
1. Add an external Wi-Fi antenna (signal strength seems an issue for my RPi inside a case
2. Fan location/position: dew falls downwards so ensure the airflow is drawing in from underside and expelled ideally through a side?
You could use velcro to stick the SSD to the housing. Not pretty but it works. I use an SSD as well. MUCH faster than a SATA drive but also more expensive.
Yes, don't get me wrong, I'm interested with this "as-is", but as we're still in the stages of design, just thought that some suggestions might still be worthwhile. Even if it is space internally to house a 2.5" SSD SATA, and a hole (perhaps with a blanking plate) big enough to loop a USB cable back internally.
So the idea is really good, first I will do some small updates on the current design to prepare it for assembly with an SMD machine.
SSD, M2, or such drive would require a bigger design change, but this point is on the improvement list, thanks for the feedback!
That is a good idea, but unfortunately, currently, the Raspberry design has no option to connect an external antenna, maybe to hack the RPi would be possible, but one of the main points was during the development is to use the RPi as is, then everybody can attach it.
That is a really good point, currently, the GPS and the fan are on the same side, and to use the internal GPS antenna the top of the box should point upwards.
The 12v power is connector, is that a common style connector with leads that can run from a battery pack with say a car style cigarette lighter socket on ?