I was told Air New Zealand used this procedure with their DC10-30's on their services across the Tasman to Australia toward the end of their life at ANZ but obviously an agreement had to be in place with the revenue collectors to get any benefit from it.
The DC10-30 without CLG was offered to Cathay Pacific in the early 70's on the basis the CLG could be added later and the Flight Manual revised if long haul services were introduced. CX opted for the L1011 in the end.