Thanks Laurie, I agree completely. Do what you want to do, Flear. Hopefully you enjoy doing it. We've pointed out a lot of flaws or areas of concern. Maybe if you overcome any of them, you can post it in a journal thread. Maybe our cautions will ring true, and you can come back and confirm our thoughts. For the record, I would never risk any of my stock on precarious ventures like yours; filtration systems come cheap and quick compared to what they sustain for me, and I'm all about what I keep, not the sand underneath them. Seriously, go do it, and truthfully catalogue your experiences. I'll take you more seriously once you arrive with some experience, humility, and sentence/paragraph structure.