Hey Ian, as mentioned elsewhere, very good attempts.
Photography is a bit backwards
Make the aperture Larger by going for a smaller number
Make the aperture smaller, by going for a larger number
So when stopping down, you go for the larger number. F11, is my favourite aperture for macro. Gives me the right amount of DoF and allows for a lot more of the subject to be in focus.
If my memory serves me right you're using a kit lens with ext. tubes? If so, try shooting at 18mm with the tubes on. I could have swore this gave more magnification (again, the back to front thing of photography). Someone will hopefully correct me if I'm wrong. I never really used tubes on the kit lens apart from to test something out a while back
Incidentally, as your name is Ian, I hope you realise you have a rather large expectation upon your shoulders!. you have to find and photograph a Dragonfly
hehe
Have a look through the posts here. 3 of us called Ian have all posted Dragons
.