Hey matt, I was going through your build once again, and I noticed that the gate valve on the external overflow box is very close to the overflow box, while I have heard people say that the gate valve is best nearest the sump? Have you had any problems with the gate valve being so high near the box?
I haven't had any issues with it being close to the overflow box. What is the reasoning for it being close to the sump? I kind of had to do a makeshift Beananimal overflow because of the limitations in size and location with my box, but I haven't once had any issues with it.
I can try to get some more pictures with better detail if you like.