Just woke up and read that and did not understand a thing
I'm sure it makes sense but not to me right now, being sick and barely awake.
In VW land, the different weight group rods go in different engines. Not mixed in the same engine. All 4 are within 8g.
So one engine has rods from the same weight group only.
I have found it fairly easy to go from 8g to 1g accuracy.
I know race engine builders that go to 0.1g accuracy... I think that's overkill but if you have a scale that can do that and time to kill, go for it.
We built 10.000rpm aircooled VW engines that ran just fine with 1g
