All my Upgrade mods in one place
chests upgrade Wooden->Iron->Steel
Burner Inserters upgrade to Inserters
Burner Mining Drills upgrade to Electric Mining Drills
Furnace's upgrade Stone->Steel->Electric
armor upgrades light->medium->heavy->modular->power->power MK2
electric poles upgrade small->medium->large->substation
iron axe upgrades to steel axe
gun turret upgrade to flame turret or laser