Welcome in to Old Mountain Bricks everybody. In this video I walk you through what a LEGO MILS plate is (Modular Integrated Landscaping System) and why I use it all over my LEGO City. The big reason is simple: regular 32x32 baseplates flex. Once you start stacking real weight—like modular buildings—things can slip, slide, and you’re one bad move away from a catastrophe when you transport or pick up a section. With a MILS plate, you go from bendy to rock solid. I show my step-by-step method using a standard 32x32 baseplate, a bunch of 2x4 and 2x2 bricks for the “underlying brick,” and then plates on top—my easiest approach is using 16x6 plates to save pieces. I outline the border, reinforce corners, add the main supports, then build that classic “plus/cross” support through the middle so the top plates have tons of contact points. I also show how to adjust if you’re using smaller plates like 6x8s or 4x4s—sometimes you just need to add a few extra bricks where contact points are missing. By the end, you’ve got the standard MILS height (a brick and one plate), a base you can actually lift one-handed, and a layout system that makes modular city sections cleaner, stronger, and easier to change over time.