Good to see some success Crysis.
Just a note that many folks don't seem to have a good understanding of tubes.
The shorter the focal length used and the longer the extension, the more close you can focus .. and increase magnification of course.
You can actually achieve a point where with too short focal length and too long extension, and the only thing you can get in focus from the lens is the dust specs inside the lens!
That is, you can only focus the lens if the subject is inside the lens .. obviously hard to do with some insects
They can work quite good with zoom lenses where you add the extension tube of choice and then FOCUS with the zoom ring.
So consider a situation where .. you place camera-extension tube-lens somewhere and a subject you want to get close in too somewhere in front of the camera.
Then, instead of moving the camera or subject to get it all in focus, all you do is
zoom a bit in or out as needed, in such situations the actual focus ring really does a bit of fine tuning of the focus plane.
Was the $10 note of the
Commonwealth of Australia variety?
I used to have a pile of those old notes years and years back .. have no idea what happened to them tho.