http://www.lotustalk.com/forums/atta...o-005-copy.jpg
and
http://www.lotustalk.com/forums/atta...o-006-copy.jpg
Major improvement by vertically extending outermost diffusers almost to ground level behind rear tires, otherwise apparently the flow past rear tires converges so as to bugger the flow closer to centerline such that it is poor.
Pls. read and consider, then comment.