That is great John. Thanks for sharing it. I'm getting ready to put a 20-gal vert together for my new pair of pumilio cristobals (my first pums - I'm so excited). I've used Gorilla glue rather than silicon to attached the fiber material to the backing. Is there a reason you prefer silicon? Most of my vivs have fern panel backing so I'm new with the great stuff method. The Gorilla glue expanded a little so I had to press more fiber into it before it fully cured, but it seemed to do the job.