Excessive vibration

[JAG]

Just to clarify - this is the first flights after overhauling and static balancing the props? If I have that right, the first thing I would do is have the props dynamically balanced. I installed new props this past year, and even though they were statically balanced and I had installed new engine mounts, the dynamic balancing took us a while to get the rear prop to acceptable limits. I have worked on a planes with props (cessna 150 to Lockheed Hercules), and static balancing is only for the prop uninstalled, dynamic balancing is for the prop installed on the engine.
Jeff