only use it for load balancing yeah there's another aspect to it as well, because like even after you've unlocked like four or five tier belts you're still using those, lower tier belts for balancing stuff like but sometimes it just sometimes it's like what if you want to reach that 100 efficiency thing and just see all the belts be filled up all the time then you want to select the belt for the correct output so to speak, but I just I usually just build the fastest one especially if it's mark 3 when it makes sense because then it's just cheaper to make it