I don't know the exact way of doing it, but I was thinking of rain gutters. Setting the pots up on blocks, with grating on top, or just the blocks, doesn't really matter, ten maybe have two raingutters butted up next to eachother and have them at a slight angle to collect at one end. Just cap them at that end and either make a spout you can pour into a bucket, or just have a cap you can remove to drain the water into something to transport it.
Also about the screen you can use whatever you want, but I really love the material I got. They might not have it where you live, but it was backing for a stucco wall. It had construction paper all interwoven with the 2"x2" mesh, I just took off the paper and cut the screen to size. I think much smalller squares and it would have been a pain pulling stuff thorugh, and with this I can reach my fingers from below to grab leaves above and pull through.
Good luck, and when it's all done pics.
Good idea with the gutters Jig. One for each row of pots is perfect. Just pick up a moderate sized bucket when you get the gutters for you to collect all the drainage in. I don't think you would have to raise the gutters too high on the one side maybe like 1/2 an inch maybe less.
Hmm i don't think i would have liked removing the extra material from the mesh you used, is it particularly malleable? The spacing of the holes you described makes it seem that if it were easy to work with and had particular structural stability it would be an ideal screen with out the extra material.
Moose88 i just went to the garden section of the hardware store and asked where the chicken wire was. They showed me right to it and there was plenty to chose from. Choose your screen material wisely, you should think about how you will be placing and mounting your screen in your grow when you pick a meterial.
There are several hole spacings to choose from. Choose one that you think will be the easiest for your hand to work with, Haha meaning make sure your fingers can fit through the screen's hole holding a twig or something
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At my super hardware store there were these inexpensive green steel posts made for holding the chicken wires sitting next to the them. You could probably use these with a cinderblock or two to hold up your screen. You will have to place a few vertical posts around the pots as a skeleton for the scrog. From there its up to you how you attach the chicken wire to the posts, i have never used the posts, so i cannot comment on how to use them with the chicken wire. Ask a garden employee how to use the posts and hopefully that will give you ideas. The shape of you screen is up to you as well. If those posts are too heavy duty for you, i used wooden doweling rods, zip ties, and chicken wire to form my screens.
A word of advise i would stay away from the metal chicken wire with hexagonal holes. This screen is very resilient and retains its curled shape. Unless you use a pretty heavy or particularly sturdy post this chicken wire will pull your posts inward like a spring. Personal experience... stupid chicken wire
Hope this helps.
edit: thanks for the rep man