From Yamaha's NP30 page (my bold added)

Quote:
Graded Soft Touch Action - NEW
Because of its similarity to acoustic pianos, a graded action is one of the primary features sought by pianists in their digital instruments. While technically a non-weighted action, the new Graded Soft-Touch keyboard is the first of its kind bringing different levels of resistance without the extra weight of moving hammers the key contributor to the NP-30's fighting weight of only 12 pounds. The end result is a very playable action that will appeal to pianists who want to take their music anywhere.


Love how they try to hide those facts in marketingspeak. It's a no-weight, not synth weight, not semi-weight, not fully weighted, not nothing...

Ought to be perfect for those used to the S900, Ian...
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An arranger is just a tool. What matters is what you build with it..!