Adds 4 high-speed locomotive tiers and matching wagons:
Mk1: 4x faster @ 73% effectivity
Mk2: 5x faster @ 63% effectivity
Mk3: 7x faster @ 50% effectivity
Mk4: 50x faster (startup speed adjustable 20-100% in mod settings)
Cargo wagons: Mk1/Mk2 inventory 100 (Mk2 with far better braking), Mk3 inventory 200
Fluid wagons: Mk1/Mk2 111k capacity, Mk3 222k
Artillery wagons: Mk2 with double shell damage and double reload speed
Quality upgrades now affect speed, inventory and capacity.
Consistent color coding per tier, custom tech icons, distinct working sounds per locomotive.
Mixed-tier trains trigger a chat warning; /hst-info shows what the mod has seen on your map.
Safe to add to existing saves - new content unlocks via the tech tree.
Fluid and artillery content by /u/Ostrei