EAA got the Witness kits to me in a hurry; they arrived last night:
That's the Super-38 slide/barrel, below that the 9mm slide/barrel and below that the 40 S&W barrel.
As you can see, the 9mm kit is blued, not Wondercoat finished.
And what you can't see is that the toggle on the 40 S&W barrel has a slightly different contour and will not smoothly go into battery.
I've got some emailing to do.