Yep! I haven't mentioned their size, and on the moon, size for strength is not quite as important as it is on Earth.
Unfortunately, I have a hunch they will be big enough to be scary, but who's gonna see them?
From a distance, they'll probably look cute.
I also have not described the "wrist" joint, which will be complicated, I assure you!
Well, it's good to know my brain is good for SOMEthing!
I kept thinking Shelob, only on a smaller scale...*snort*