Absolutely beautiful images, and very interesting lighting setup!!
I have something similar, but with multiple strobes for my usual chip and/or wafer subjects. Recently I've replaced the strobe modeling lamps with LEDs, so I can do continuous illumination without the massive heat build up from the incandescent bulbs, as well as flash.
Sometimes I'll use 2 light tents (small one (~30cm) inside larger one) or a foam cup inside a light tent for more diffusion. Are you using a single layer for diffusion or multiple layers?
I have some images of the setup but don't what to detract from your thread, unless you want to see them.
Please keep posting, these are really nice images
Best,
Research is like a treasure hunt, you don't know where to look or what you'll find!
~Mike