Very beautiful results Charles!
I have made a stack image of a green shield bug yesterday, quite similar to that second one. Although of course not as perfect in technique.

But it is fun to experiment with stacking. You discover details you would otherwise never see! It is realy like exploring the body of an insect.
My lighting is less even. I use a photocontainer as diffuser. Works well but gives more light from the sides.
I sometimes use pictures torn from a magazine for my backgrounds. When you use pictures with grass and sky you get a very natural looking background.
I'll post some more stacks when I am back from a trip to France.
best regards,
Wim