More of practice than anything... Thanks to timemit, I tried your suggestion.
After 5 hours and 12 tries this is it (yep full renders) I was never satisfied how the tubes came out or even the center thingy. So I kept changing and moving and rendering. I finally liked how the tubes reflected and somewhat on the lighting (more practice with that)
Anway I used my #12 fractal both in a positive and a negative gel.
thanks for looking, have a great weekend!