I'm returning to the track after a long break, almost 35 yrs! I'll be racing in ITA, closed cockpit. I raced formula V's way back when and all we had then were open face helmets. Had a bike for awhile and rode with a full face helmet. I'd prefer to use an open face helmet for the track if not in an open cockpit or on a bike. What issues am I missing, if any. I see that the pre-drilled Hans fittings come w/ either type of helmet depending on which one you get. Thanks for any comments.