As all said above... on smaller props you can do find without balanceing them...
I always did.... I was using a finger balancer, with paint, C.A. etc on the lite blade
or if a little off sanding the heavy side...
But now I use the Top flight balancer... *^#&!..... Trying to to work my "hub" time
down.... I think spending an hour on ea. is a bit much.... As I said... I do all my
props.... You can get away with it on smaller props...... But, if done right, it can not
hurt, only helps......
On your queston.... I guess you could make one.... But, you would need some kind
of cone or such so as what you used would fit on the edges of the prop hub hole and
hold the prop stright... and what ever hub shaft you used needs to be as friction-less
as possible..... As said above... prices are pretty good.... JMO