I have printed the base components of the first Earth Explorer prototype:

It took 36h to manufacture the parts needed to get a rolling chassis. Things like a battery box, mounts for the driver boards, the Raspberry Pi or the camera are still missing, however I will be able to get a driving rover during weekend. The "Internet of Useful Things" section of this years HackadayPrize comes to an end on Monday which is why I will work on my project the coming days to turn the static camera that transmits photos from my attic into a mobile image sensor which is more useful, I guess.