Easy way to turn plastic gutters into a NFT hydroponic system. PLA caps can be glued on using PVC primer and PVC Cement.
Mounting Brackets for downspout channels
...Plus http://www.thingiverse.com/thing:1687100
Net pot Blanking plate http://www.thingiverse.com/thing:1688178
Square Net pot for Rockwool cubes http://www.thingiverse.com/thing:1698310
The downspouts are vinyl from Home Depot in Canada they have rounded corners of approx 15mm radius and outside dimensions of 78.7mm x 58.7mm. I'm not sure if other plastic downspouts differ from this if you know please post in the comments.
I am making use of 2" net pots from http://www.thingiverse.com/thing:240034