Makes the Steel arc furnace to be a bit better then the normal arc furnace compared to its increased size. Now its a real alternative in death world scenarios.

• 4 Module slots, on par with other steel machines
• increased speed from 4 to 6, to be more space efficient, still worse than the normal but close enough
• reduces pollution from 12 to 6,5
• reduces power consumption from 600 to 500

Added recipe for glass ingot that takes refined tin instead of tin gravel with a 33% speed bonus mainly to combat tin burning for lead. Unlocked by ore-washing.

Safe to add to existing game.