thats interesting, I was just thinking about building my own skimmer, after looking at how they work it looks like it would not be that hard to do. I know there's a lot involved in getting the water and bubble ratios right. I can see were there would be a market for someone that could build a good skimmer and compete with some of these name brand skimmer that sell for up to and over a $1000.
If I don't build my own I may be interested in one of yours, I think I'm gona have to have one bigger then what I have now, It's rated for up to 125 gal. and my new system is around 185 gal.