Can you clarify about your 3 t towing ability.
My NW Pajero has max tow ball weight of 250Kg up to 2.5 t and up to 180Kg to 3 t. Similar to my old NP Pajero.
So I assume your tow will be a Triton or similar, not a Pajero.
I have just had a major drama and cancelled Jayco van order with excessive tow ball mass on a van I ordered. It had an Empty (Tow) Ball Mass(263Kg) after Jayco info said 175Kg, so be careful about the 3 t Mitsubishi towing ability. For more info see my thread.
http://www.expandasdownunder.com/threads/starcraft-outback-18-55-3-yabbietol-terry-and-ellie.6179/
So in summary please be very careful about Mitsubishi 3 tonne towing.
Regards Terry
Correct Pajero has 250kg up to 2500kg and 180kg over 2500kg, triton and challenger have 300kg - 3000kg