The article further down has a diagram (and a reference to the source the Economist) which shows how automotive was 70% of their revenue in 2008 and how outdoor

The article further down has a diagram (and a reference to the source the Economist) which shows how automotive was 70% of their revenue in 2008 and how outdoor and fitness is ~50% today. they may be highly profitable in aviation and marine and they may develop there first. is that what you mean by core? because revenue-wise the core was automotive in the beginning and now is outdoors and fitness.