I have built 2 control centres (for want of a better description) They are metal power/gas meter boxes that I picked up cheap. As they are large enough to hold all the power supplies, control boards and more, I am using convection for ventilation. I have put a couple of pvc elbows top and bottom of them and I have attached flywire over them to keep bugs out. However, as they are housing a lot, I have a lot of wires coming out of the bottom. The one under the mega tree has over 20 cables coming out of it. The cables just run through a large hole in the bottom. Can anyone recommend a way to bug proof this? I thought about cable glands, but frankly that is a lot of them and the holes were already there.