Demonstrates flat 1-based `$index` translation into true 2D matrix coordinate layouts using modular arithmetic (`@Trunc`/`@Mod`). Showcases flush structural corner intersections using localized dimension offsets to eliminate profile interferences when utilizing a standard centroid-aligned ($X=0,Y=0$) profile library. Additionally highlights string-driven conditional routing via `@If` and `@IsInList` on sub-assembly parents to seamlessly manage outward orientation swaps across complex geometric boundaries.