Piggy Back

For those that saw the Caterpillar yesterday.Some of this will be familiar?But this fly is actually on the back of another of those Caterpillars!
I was discussing the macro adapter that Draco uses,with her.And considered buying one to up the magnification of my Sigma 105 macro lens.
With this shot I used my D3 + the Sigma and cropped it in Light Room and sharpened it a little. I think the D800 would has done better ? And tone back the ring flash a little as well?
I think I will experiment some more b4 parting with any more cash!