Sure i got a few pics laying around, but i gotta say this thing was a hassle to get just right, had to deconstruct and rebuild it like 3-4 times until it worked, the biggest issue was the even distribution of water across the membrane, if one of the layers are not sitting flat you'll get water pooling on one of the sides, if the whole system isnt sitting perfectly level you'll get water pooling again, then theres flow rate adjustments to consider, but when it works it works well.
anyways, the base is just a flood tray, according to Andrews instructions the water input/output must be under all the layers and for that he suggests drilling the sides of the tray near the bottom so that the connections are still technically drilled in the walls of the tray but low enough that they are under the drainage bumps that most trays have, my tray is a cheap one so i didnt have the luxury of raised draining bumps at the bottom, i had to connect the water input/output by drilling the flat floor instead.
for the buffer layer i used a 5mm thick synthetic polyester felt, since my tray had a flat bottom i cut up 4 strips and placed them close to each other but not touching so water can flow between them, then placed a larger piece on top of them to make things even, the cut places on both ends are where the water input/output is connected, not sure if you can see it..
learned the hard way that if the layer was covering the input/output it really slowed down the water flow, in the picture above i already cut a piece on each side so it doesn't cover the input/output, the picture under this post is a bit older so you see its still uncut where im holding it.
i wish i took pictures of the sublayer but i cant find any... i used this thin semi rigid plastic sheet to make it, looks like this:
only i bought a much larger one from an arts supply store, but its 100% the same stuff used for these kitchen mats.
to make the sub layer out of it i first measured the flood tray floor and walls, then marked with a sharpie on the plastic mat a rectangle just a tiny bit smaller then size of the tray floor, then added marking for the tray walls, these will be bent by hand upward later to create a tray, this tray will be the sublayer and will sit inside the flood tray ontop of the buffer mat, i dont have a picture but it kinda looks like this:
The solid lines are bend lines, the cut lines are where you cut the flaps that are later tucked behind the light gray wall flaps after bending to shape.
before bending everything though you need to puncture tiny holes in it to allow small amounts of water through (white dots in the drawing), i did it with a sharp poker and by forcing it in it creates a tiny indent that pushes the plastic inward before making the actual hole, after poking all the holes flip the mat over and bend it to shape, its important to flip it over first because you want the tiny indents to protrude upward, this makes it hard for water to seep back down once it goes through, you can see in this image where the nylon membrane is already sitting on the sublayer, the tiny indents where the holes were punctured are visibly pushing the fabric up:
the membrane is just a simple nylon fabric i got from a local fabric store, the plain white ones tend to be uncoated and not water resistant.
the cover of the system and the holders of the plants are the easiest part.. just a black plastic sheet from an art store, i cut square holes for the plastic electrical channel i used to hold the rockwool cubes, they fit perfectly in these plastic channels.
the rest is nothing special, 30L barrel as the res, some black tubing with a small flow valve in the middle of it to control the flow of water and a 20L bucket on the other end to catch the excess.
hope this helps
