Crankshaft balance Physics question

[Mike Taylor 3601]

Any one that has ever ran ext. balance like 400 sbc or 454 bbc can tell you how much better they are int balanced, cranks last lot longer.
I would rather have heavier crank internal balanced than lighter one ext.
Counterweight placement has alot to do with harmonics also,like Art spoke of I think his crank had none are little counterweight,you can have inline crank balanced without counterweights, but it does'nt work and won't last.
I have noticed some of the China cranks when I get down to 3-4 grams I have to work to get them on down to around 1 gram or less, I believe it has to do with counterweight placement,don't have that problem with good crank a Callies or Crower etc.
Mike Taylor 3601