Did one a few years back, also again this year.
Don't make the screen too big as it's not fun to crawl under it come September...
Also I google image searched "outdoor scrog" to get an idea on how to make it....
I think I am going to use a bamboo frame to hold the screen up....
Don't buy that....it's garbage.....
also Jess ...sorry about your kite....I almost bought a carport last year...just couldn't shake the feeling that it would end up in the next county...
Thing is, the minerals that make your water hard also act as ph buffers. So you will fill your 250 and ph it, water your plants, then when you get to the last plant the ph will have drifted up a few tenths ....Over hours tenths turn to whole points....then your right back where to started...So...