anchor.diff:  			tank_one.loc = get_turf(src)
   			tank_one = null
   			update_icon()
  +			if(!tank_two && (w_class > 3))
  +				w_class = 3
   		else if(tank_two && href_list["tanktwo"])
   			split_gases()
   			valve_open = 0
   			tank_two.loc = get_turf(src)
   			tank_two = null
   			update_icon()
  +			if(!tank_one && (w_class > 3))
  +				w_class = 3
   		else if(href_list["open"])
   			toggle_valve()
   		else if(attached_device)
  
positive.code: 			user.drop_item()
  			item.loc = src
  			user << "<span class='notice'>You attach the tank to the transfer valve.</span>"
  		else if(!tank_two)
  			tank_two = item
  			user.drop_item()
  			item.loc = src
  			user << "<span class='notice'>You attach the tank to the transfer valve.</span>"
  
  		update_icon()
  //TODO: Have this take an assemblyholder
  
negative.code: 	return 1
  
  /obj/item/device/transfer_valve/attackby(obj/item/item, mob/user)
  	if(istype(item, /obj/item/weapon/tank))
  		if(tank_one && tank_two)
  			user << "<span class='warning'>There are already two tanks attached, remove one first.</span>"
  