It is entirely possible to have all three Kenko tube installed between your camera and the 100L. I did that. However, it is really necessary to have a very stable support on the system, the minutest movement is going to blur the image.
The image I tried with this setup showed even the scales on a butterfly wing. Though the distance to the object you're photographing is only a few inches, a live butterfly would not stay for you to shoot it, photographically. Mine was a road kill.
PS., the image was not cropped.