Nick - nice to see you like something about the 225! It has some good ideas that Sikorsky would do well to steal (eg FLI), likewise EC with Sikorsky ideas, then we might get the perfect helicopter (plus lots of law suits
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212man - I think the underfloor fuel is grandfathered, however there is an interesting paper produced by someone at the UK CAA some time ago that made the point that it didn't make much difference whether the fuel was underfloor or outside - if it leaks and catches fire you will be in a pool of fire either way. Fuel, whilst still in tanks, tends not to burn much because it can't get enough oxygen.