At home flywheel balance....
Have a look how they balance V twin motorcycle cranks ;)
The use of clay looks similar, the static methodology is not......maybe you have some other examples on that......
[ame="https://www.youtube.com/watch?v=Jn50F_yKW0s"]Harley Crankshaft Balancing - YouTube[/ame]
Not sure how you will know if your method is in any way accurate or if you get lucky and hit the balance right on these 1-2 tries? I.e., could it be repeated in the field by anyone? The source of error will be the bearing stiction that has been referred to and is a very real issue. (And which is something I have actually done and have seen the criticality of having essentially 0 bearing stiction.)
The example of the old prop balance method addressed that very issue; but that worked adequately because the prop RPM's are limited to about 2800 rpm, AND perhaps more critically, the moments around the center are huge compared to the case of a flywheel (the props typically will be 55" or longer), so small imbalances generated a lot of relative imbalance that could be found with reasonable accuracy and repeatability, and with the small bearing friction of the knife edges.
You'd have better prospects with a fluid or air bearing.
