Do you mean drill the holes in various heights to control the system? Would this not require a deeper overflow? Think of the diameter of the hole as opposed to the amount of surface the elbow pulls water from. What I mean is the overflow would be slimmer but deeper with no elbows, deeper but more shallow with them.
Personally I did not use a coast to coast I did not want the shade area created by the overflow. I went with a more standard overflow box and built a modified version of the 3pipe overflow. I did it incase I wanted to change it to a more standard system as the bean animal overflow was still a pretty new concept when I did it
Personally I did not use a coast to coast I did not want the shade area created by the overflow. I went with a more standard overflow box and built a modified version of the 3pipe overflow. I did it incase I wanted to change it to a more standard system as the bean animal overflow was still a pretty new concept when I did it