It's amazing what a difference decent equipment can make.
A Raynox diopter on the end of a Sigma 70-300, with off camera flash bounced off card.
Compared to a Hoya +4 CU lens on the end of an 18-200 Nikkor with available light.
Now to try it out on some small creatures. Should be more tricky as they have a habit of moving around and aren't nice and two dimensional.