Very nice design with excellent pictures. The article would be better if you came back and told whether you got the PVC you were waiting for, and did it make a difference. I do like that you checked to be sure 1 week chicks can use this. I also like that you reported on the slow flow and how you fixed it.
Also, PS. Aart is a woman. Great designs, and I applaud that you give credit where you got the basic idea from.