I've got a question about (not a nice word)(not a nice word)(not a nice word)(not a nice word)pit room. Are there any studies or knowledge as to how much room should be above the drivers head in the (not a nice word)(not a nice word)(not a nice word)(not a nice word)pit? Distance between helmet top and bottom of roof bars? (not a nice word)(not a nice word)(not a nice word)(not a nice word)pits are getting smaller and for a taller driver there isn't much for room.