I have just replaced the rear air bags and the compressor on my disco 2 following the very good thread on suspension on this forum. The problem I find myself with is that I can only seen to inflate one air bag or the other I can't get both to inflate at the same time. I have connected the pipes up as per the diagram on the thread ( feed to the centre right return on the right left return on the left ) I have tried all permutations but just can't seem to get the two to inflate at the same time help please!!!!