Ref: the original thread on height of the centre post. My experience is with the Caterham supplied screen and mirrors. On SOME LH corners, particularly going in to the complex at Croft, the mirror obscures the apex. On others eg Mansfield, and entering the Mountain at Cadwell it's fine. As someone said above it depends on your height, seat, and whether you sit upright or "slump". At Croft I sat in another 7, where they had LOWERED the standard Caterham centre mirror, and found it the best option. I'm thinking of doing the same.
CHALLENGE...............Will some tooled-up blatter invent an adjustable version? With an inner and outer tube and locking device? That would be the ideal answer.