WE just bought the suppliesto build pvc feeder;4" pipe & fittings. some questions. 1. What is bestso hens wont scatter feed out:cut slots, drill holes ? what size?, or just cut top out. 2.It will be in the run so how high should we mount it? 3. How do we keep the girls from roosting on it: put in corner, or put cover over it to low for them to get between? we are planning on making the " L" shaped one . We would truely apreciate all thoughts, comments & ideas we wont be making it til tommorow so we can hopefully get feedback from you all so we can make better desitions about design. thank you all Mike & Angie.