I don't get what you're trying to say here broski. Sounds like a sales-pitch to me. I don't know that there's anything a genesis machine does that hasn't already been replicated by some folks here. Telling people to stop tinkering (wasting time) with established, as well as un-established ideas/parameters, to promote an over-priced system/CD-ROM... What's in it for you? The atomix: If I were a betting man, I'd say they went under because the market for a 5k aero rig just wasn't there. Not due to any patent infringement, though I am a bit of a conspiracy theorist myself The link you provided is broken, btw. Stem restriction: Most everyone I know of uses netcups with rockwool, topped with bio balls. I don't think stem restriction plays much of a roll there. PF loves his PVC couplers, and as long as the stem doesn't out swell the coupler... Same result. I cut my own neoprene disks using a much denser foam that used in the ones you can buy. The foam held the plant it's entire life of about 6 months, and the stem was about 2" diameter. While my disks provide the most restriction of all, I could see no visible signs of restriction around the stem. One would think that if the stem was being pinched too hard would form an abnormality around the area. Not saying saying it doesn't in a small way play a role, just that it's nothing to go reinventing the wheel over. If you bought the CD-ROM, why don't you build something from it and show us what it's about. I'll watch that. Less preachy preachy, more buildy buildy. All in good fun, man.