Engine balance after new pistons

Lots of good advice in this thread, don't matter if it's a little old.
And also, this is my opinion only.
With the exception of the above mentioned balancing math mistake, you can't go wrong having a new assembly balanced.
But,.... if the only New stuff in the assembly is pistons and rings....
and if you can weigh the old piston properly....
and if they are within 20 grams of the new.... (mopars original balance tolerance)
(Weigh everything normally hooked to the small end of the rod. If you are replacing pressed pins with full floaters, yes, weigh the clips too)
...then you probably can get by without.....
but I would balance it anyway.