Just read through it all, only my first post here but great to see an aquarium thread being a bit of a tropical aquarium lover myself. Great work on this, i recently saw an aquarium placed into an existing wall cavity, looked no where as nice as yours, what they did was cut a large whole in the wall, placed a small size height wise aquarium in there, then in the left over cavity installed a large flap so they could feed the fish, change filters etc. The flap was not finished too well and had a large amount of space between it and the existing wall. Bit of a shame as it had great potential but looked terrible on top. Cant wait to see the finished photos!