The L/R fuel system I agree does require a better understanding than most but given good preventitive maintenance (cleaning of in-line filters regularly) there is no problem with it.
Although in saying that the 407 has done away with ejector (jet) pumps in favour of boost pumps in the forward (1 only) cell.
The L1 didnt have the ability to indicate fwd tanks quantity independantely, an improvement bought in for the L3.
But in either machine dont ignore the 'Fuel Low' light.
