2005 Grand Scenic roof rack positions

Hi All



I have heard two conflicting views on the mounting locations. The first being that you can only use the ones over the front and rear doors. The second is as above plus the front of the most rear pair (roof bar storage area).



The largest spacing, front door + rear pair, would be perfect for long items like ladders or sheets of ply



Has anybody used the the largest spacing before?



Thanks

Andy