The updates look great and I really like having them inserted into the picture section at the beginning of the thread.
It really is a pain to lay out the room design and then find hidden things in the wall after you open it up. The concrete block wall really messed with your plans but your solution worked out really well. The finished room looks great.
I agree that having the 40B's with the short end out makes it very difficult to work on the tanks, especially when using a rack system. The long end out reduces the number of tanks you can fit in the space available but makes it easier to work on the tanks and you will be able to view the fish much, much better.
Again, very nice job!!!