Typically a prop not in static balance will not balance dynamically. Every time you place a solution weight the clock angle/IPS will change, but not go down. When I did dynamic balances I always started with a questionare on the airplane. You can have the props dead on balanced but a bad engine mount will create havoc. Magnetos, ignition leads, plugs, etc can also affect vibration levels.
Also track is something very few mechanics ever check when installing props. The prop and spinner can be balanced but if not in track will create some interesting vibration.
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