So you've proven my point a third time. Really, you're too generous.
Moreover there is no positive evidence of irreducible complexity. It is an appeal to ignorance. I.D.’ers don't know or cannot explain (or more likely don't want to accept the explanation) how this structure could arise by natural selection of genetic variation; thus it must have been “designed” by the “designer”.
In what way is that not a “designer of the gaps” argument?