Thetfords are for number 1 and 2 only - if you've reached 5 you've had far too much beer or curry...Yes forgot to say we have a Thetford - but we just don’t use the toilet tent - it is a real bonus for quick stop overs or days out (ours has to stays in the boot as too tall to go under the seat as was from our tent days).
So will add that as number 5)