I'd be very curious to get a description of your lighting for macro. More specifically how are you lighting your subjects.
I've just started dabbling with macro. I have extension tubes too. And an off camera flash. But so far have not figured out the best way to light stuff for good macro shots.
My only macro keepers so far have come outdoors in nice even natural lighting.
Agreed. I never thought I would be untested in macro photography when I started, but it is more interesting than I thought. Can be expensive though. Lenses, tubes and lighting all add up.
It can be done on the cheap, below is my rig, which is quite cumbersome. The transceivers and speedlites are both Yongnuo brand, which is very cheap and of a surprisingly good quality these days. I know that the YN560 III speedlites have transceivers built into them now and can be gotten for $90 from ebay, working on both Nikon and Canon's. The o-shaped macro rig they are affixed to is only $30 from ebay also. You then need a couple of mini softboxes to help diffuse the light also.
There is a good book on lighting for macro by a husband and wife team:
"Flash techniques for macro and close-up photography" by the Deutschmann's.
It covers all you may need to know for getting started.
The Strobist website also has a lot of good information that can be derived to macro application.
My unwieldily rig:

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Todays picture of another Hoverfly, this time in a small flower getting a feed of nectar.
