Kevin
Try.
david-billington@blueyonder.co.uk. He wrote the article and is a realy nice guy. It was published in the UK club magazine some time ago. I feel sure he would agree to have you submit it to the Forums technical section.
Thomas regarding originality the 411s didnt have factory air. I dont like the look of the aftermarket units hung under the dash therefore like Kevin I designed and fitted an intergrated unit which cannot be seen inside the cabin or under the bonet.The air comes out the dash vents or on your feet or on the screen.