I am planning to build one like that of openrigs.com.
Searching for plastic corner joints for square aluminium pipes which would make the assembling much more modular and easier. I might take some time as I am in the process of shifting flats.
http://i.ebayimg.com/t/25mm-1-Metal-Square-Tube-Speed-Frame-Fittings-Plastic-Joiners-Inserts-System-/00/s/NDA0WDQwNA==/$(KGrHqRHJBgE+Febe)wKBP0cmcht5w~~60_35.JPG
And yes it will be stackable.
Searching for plastic corner joints for square aluminium pipes which would make the assembling much more modular and easier. I might take some time as I am in the process of shifting flats.
http://i.ebayimg.com/t/25mm-1-Metal-Square-Tube-Speed-Frame-Fittings-Plastic-Joiners-Inserts-System-/00/s/NDA0WDQwNA==/$(KGrHqRHJBgE+Febe)wKBP0cmcht5w~~60_35.JPG
wKBP0cmcht5w~~60_35.JPG){kind=link}
And yes it will be stackable.