Right - I wasn't even pondering with Nemos crew, but that can be indeed considered some sort of pass par tout. Re: size of bits - I think weapons, hands, heads, and generally everything that adds character to the mini is slightly oversized. Might look a little weird with the 3D render, but I am sure it's gonna be alright once casted.
I think I shall give it a go but limit it to a few blades.