Here is the hole i drilled. I measured it and placed it below the egg crate, but above my waterline by 1.5 inches I will run my aquatic heater power cord out this and the airline for my water filter.



and here is the back of the tank foamed up. The ledge is in place and the front edge is foamed as well. Once this cures I will do one of the sides and then repeat till all the foam is done.