Just to update,helmet fully sorted and fuctioning correctly now.Oxford were useless im afraid.sent lid back after 2 weeks exactly the same.Schuberth sent modified parts to me directly.good service from them.
That is good to hear. Can you let me know how you progressed this directly with Schiuerth so I can try the same route?
but i can live with that I get a small exchange of air which I like

Agree