Back to the roll hoop question. I've looked at drawing K31 and also the diagram on page 185 of this document:
http://wormhough.co.uk/Documents/150...afety)_(K).pdf
Regarding Monaco and a single seater, is the understanding that they will take a straight line from the rear hoop to a front structure (probably dash hoop structure) and you must fit underneath this? Or you must be 2 inches below this line?
Roger