Hey, yeah we tweaked some things around because I noticed that UnitAI range checks where breaking, and LOS uses center-to-center (as you well know) for now, so we need to match it. Here's how things stand: Alert Raise is edge-to-edge Auras use center-to-center again - the reason is mostly Nescio's concern that edge-to-edge gave too big an effect to structure size BuildingIA is edge-to-edge (so building arrows) BuildRestrictions use center-to-center again - the rea