My 360 build.

OK
my 2 cents on the balance
you balance 100% of the rotating weight- you are not changing that
you only factor in 50% (or so) of the reciprocating weight
which is the rod small end, piston, pin, rings
not an exact science
so what? 50% of the difference in piston weight?
so you end up overballanced a little figure out how much
what impact does an overballance that size make
who overballances Dilibertly and why?
in which plane would any overballance shake be felt- H or V
would motor mounts hide?
may not make any difference
I say if money's tight go for it