This writeup in 1979 propelled the Tarm business in the US from almost nothing to 15 million dollar per year - which, in 1979, was a LOT more money than it is today! As an example, the OT 35 model shown on the picture sold for about $3200 at the time. A similar multi-fuel is about $10-12K today. Back then, before the internet, a story like this could virtually create a business. I did not buy the Tarm biz until about 1988, however we still regularly heard about this cover from retail customers - 10 years later!