The staticy sound is still there but almost unnoticable except during silences.
Is it possible that the thing you are describing as "static" isn't really static but is more like a ground loop?

When driving even on a fairly smooth road the rio will rattle. Before I try to diagnos the rattle myself I was wondering if there were any suggested ways to stop it?
Do you know which part is rattling? Is it the handle?
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Tony Fabris