I just recently built these two new PVC feeders, I built these with the inexpensive PVC drain pipe and have about $26 total in the two feeders. I built the first one -with the RIW- hens and didn't drill the eating holes big enough to begin with. I have already trimmed them out a little bit but I do believe that I will have to open them up a little more. The second one -with the RIR Roosters- I went ahead and drilled 2" holes in the pipe to begin with. There is no waste with these feeders because the birds have to stick ther heads inside and can't fling the feed out on the ground. At the top I used two 45degree elbows with a little nipple in the middle so I could fill them from outside the pen without having to go inside. I put all the PVC together with #8x1/2" self tapping sheet metal screws and didn't use any glue at all. I wasn't sure if my idea would work so I wanted to be able to take it apart and not have to buy new fittings and pipe. So far the design has been darn near perfect You can see in the first picture how the top sticks out of the wire and has a removable cap on top for filling. The tubes are about 45" tall and hold a whole lot of feed, I estimate between 12 or 15 lbs. The bottom feeder tubes have a slight downward slope to allow the feed to fall, I may take it apart and trim the tube so I can get more slope. These birds are still on starter grower crumbles and occasionally it doesn't drop down like it should, I think the wet damp weather has something to do with it, I have to tap on the tube a little to get the feed to drop. Once I change to laying pellets I expect that problem to disappear, I will wait on layer pellets before I decide if it needs more downward slope. These two pens in one stall of my barn will eventually be breeding pens and are about 5'x8' but don't have an outdoor run yet, that will come just as soon as I get a little extra money for fence. Both pens will have 5 gal bucket nesting boxes and in the bottom pic you can see how they will look. I am going to cut holes in the bucket bottoms and cover with a plastic door so I can gather eggs from the outside and I am able to fill feed from the outside. Both of these pens have water cups that get their water from the tidy cat bucket which has a float in it and feeds from a 55 gal barrel in the hay loft. I can put ACV in the tidy cat bucket which feeds these two pens and another in the other barn stall (9 water cups total) weekly and never have to go in the pen except to clean it. I'm not finished yet but it gets closer and closer everyday!! I still have a lot of work to do on my old original coop.