Just a very short update today :)
Since the question was asked several times lately (here and in the forums) I'll make known today.
Currently the ATHENA is almost 1 meter long (98 cm) and the hull alone weights 1,25 kg (2.5 pounds),
While the ATHENA with all turrets, weapons, deck, and accessories weights 2,05kg (4 pounds).
This is a lot lighter than most of you thought, isn't it?
And as you can see with all the stuff carelessly dumped onto her, she is very sturdy and can handle moving around :)