Quoting Family Vuurzoon
Looks great! How did you build the nice structured walls?
SNOT - Studs Not On Top. LEGO has a 5:6 ratio. If a brick is 1 wide then it is 1.6 tall. So one plate is 0.4 so 5 plates are 2. 5 plates are exactly as tall as 2 bricks' width. A little math, that's all :-)