Jack can discuss this better than I
but the Uk model was rather simpler than the 150 without the floating suspension, bag full indicator and such. To my (UK) eyes the forked handle looks wrong but Jack has demonstrated with his 150 just how much easier the 150 is to manoevre than the 160 - all to do with centre of gravity. Although I love my 160 even so 
Shown here in action in 2007 - its a bit scruffy but still works well.
Al
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