I've always been a bit heavy handed for these single point suspension stands. Plus the 76 potentially puts force much further out to the edges...
End result is quite a lot of 'bounce' or 'sway' as you find yourself perhaps pounding out a boogie-woogie or rock and roll piano part. I guess part of it comes from starting on pianos and heavy organs... I simply feel pretty uncomfortable if the keyboard moves even a fraction of an inch..!
Something I've run across with the newer featherweight keyboards they are making nowadays (I played a Krome61... only 16 lbs!) is that they are VERY easy to make bounce about on the stands. Something I guess I'm going to have to deal with with a 20 lbs BK-9! I may have to go back to my old standby, the heavy duty Velcro that was hard plastic on both parts, and Velcro the keyboard to the stand!
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An arranger is just a tool. What matters is what you build with it..!