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I think we'll still end up with a Shark fin but will be smaller. Wood rather no shark fin. Also, it looks like the way the regs are written a Williams style low T wing will still be doable. Could be like a pre beam wing.
That is a visualization of the way the regulations as written look. In other words, bodywork can be placed anywhere within the blocks.
From part of 3.5.1
c) When viewed from the side, no bodywork forward of the rear wheel centre line may lie above a line parallel to the diagonal boundary defined in a) and intersecting the rear wheel centre line 650mm above the reference plane.