It seemed to work pretty well. I should have clarified and said that it was made to be mounted on the crankshaft just beyond the propeller. It wasn't just shoved into the spinner. I'm guessing it could easily be balanced as a unit with the propeller. However, since all the weight was centered around the axis of revolution, it would be difficult to get this thing out of balance unless it was made poorly.

I think the plane flew horribly, though. It didn't have anything to do with the engine or vibration.

Maybe weight in the nose would still "shake the plane to pieces." That's why I'm asking. Just curious to know if anyone else has tried it. I figured someone would have since so many are worried with weight.

Herb