phazon construction path

/datum/construction/reversible/mecha/phazon
  result = "/obj/mecha/combat/phazon"
	steps = list(
					//1
					list("key"=/obj/item/weapon/weldingtool,
							"backkey"=/obj/item/weapon/wrench,
							"desc"="External armor is wrenched."),
					//2
					 list("key"=/obj/item/weapon/wrench,
					 		"backkey"=/obj/item/weapon/crowbar,
					 		"desc"="External armor is installed."),
					 //3
					 list("key"=/obj/item/stack/sheet/plasteel,
					 		"backkey"=/obj/item/weapon/weldingtool,
					 		"desc"="Internal armor is welded."),
					 //4
					 list("key"=/obj/item/weapon/weldingtool,
					 		"backkey"=/obj/item/weapon/wrench,
					 		"desc"="Internal armor is wrenched"),
					 //5
					 list("key"=/obj/item/weapon/wrench,
					 		"backkey"=/obj/item/weapon/crowbar,
					 		"desc"="Internal armor is installed"),
					 //6
					 list("key"=/obj/item/stack/sheet/metal,
					 		"backkey"=/obj/item/weapon/screwdriver,
					 		"desc"="Phase_array is secured"),
					 //7
					 list("key"=/obj/item/weapon/screwdriver,
					 		"backkey"=/obj/item/weapon/crowbar,
					 		"desc"="Phase array is installed"),
					 //8
					 list("key"=/obj/item/weapon/circuitboard/mecha/phazon/phase_array,
					 		"backkey"=/obj/item/weapon/screwdriver,
					 		"desc"="Peripherals control module is secured"),
					 //9
					 list("key"=/obj/item/weapon/screwdriver,
					 		"backkey"=/obj/item/weapon/crowbar,
					 		"desc"="Peripherals control module is installed"),
					 //10
					 list("key"=/obj/item/weapon/circuitboard/mecha/phazon/peripherals,
					 		"backkey"=/obj/item/weapon/screwdriver,
					 		"desc"="Central control module is secured"),
					 //11
					 list("key"=/obj/item/weapon/screwdriver,
					 		"backkey"=/obj/item/weapon/crowbar,
					 		"desc"="Central control module is installed"),
					 //12
					 list("key"=/obj/item/weapon/circuitboard/mecha/phazon/main,
					 		"backkey"=/obj/item/weapon/screwdriver,
					 		"desc"="The wiring is adjusted"),
					 //13
					 list("key"=/obj/item/weapon/wirecutters,
					 		"backkey"=/obj/item/weapon/screwdriver,
					 		"desc"="The wiring is added"),
					 //14
					 list("key"=/obj/item/weapon/cable_coil,
					 		"backkey"=/obj/item/weapon/screwdriver,
					 		"desc"="The hydraulic systems are active."),
					 //15
					 list("key"=/obj/item/weapon/screwdriver,
					 		"backkey"=/obj/item/weapon/wrench,
					 		"desc"="The hydraulic systems are connected."),
					 //16
					 list("key"=/obj/item/weapon/wrench,
					 		"desc"="The hydraulic systems are disconnected.")
					)