I tried again, on real live subjects. Not outdoors, but in front of a large window (window behind the bug).
I have a M42 35mm lens I can reverse, so I intend to try that one - I would have manual control over the aperture, which makes life easier. The aperture is wide on this, so DoF is quite small.
I also intend to play with my tubes on a lens the right way round, too!
How's this?
http://farm5.static.flickr.com/4123/...525c186f_b.jpg