Cloaking Device

I assembled cloak just few minutes ago .. 3 parts unequipped, 200M on hand .. undocked and when docked device was assembled (100M assembly costs).

Hmmm...then I must be missing a piece (the only logical conclusion). Guess I'm going back to IC again...

EDIT: Sure enough, I had neglected to map the location of the Cloaking Device Crystal, and mistakenly thought the Crystal Key was the correct piece. D'oh!