My first impression was that it's basically cast iron pipe designs, implemented with your custom components. Not a bad idea, especially as the pieces are more streamlined (slip in elbows) but doesn't really hit me as a real "system".

On your "about us" or product page you should do a small write-up about that actual materials and components. Basically, how is this different or better than cast iron pipe or Klee clamps?

I'd really like to know if your system can support significant weight because most of the designs (except for the garment rack) are small structures that you would expect to hold only 10-20 lbs. I would guess from the weight and dimensions of the garment rack you are using 1-1/4 OD x .065 wall aluminum round tube.