Sorry to drag up an old thread, but I've got a question. I recently bought a wind deflector off eBay (£145 plus £15 P&P), but then realised that it was only the centre section and not the two headrest inserts as well. I'm going to buy the rollover hoop covers from BMW for £70 for the pair. Feeling slightly ripped off now by the eBay seller but I suppose its my own fault. Are the headrest mesh inserts 100% neccessary? The same eBay seller wants £125 for them, which I'm not prepared to pay, but he's the only person I can find who sells them. From looking at it, the seat headrests seem to cover up the hoops quite well so I can't imagine too much air flow being directed through them. What do you guys think?