Still at it!
I've been busy with other stuff recently so the problem isn't quite resolved yet.
The state of play at the moment is that I've got three pistons quite close in weight to each other - 469.4 (lightest as bought with out rings), 469.7 (modified 2nd lightest) and 471.9 (heaviest as bought).
The (new) heaviest piston that is awaiting the last bit of work is 488.2 grams
I'm going to try and get them all to be 469.X grams
(These weights are all without piston rings and pins fitted - so that's why there are different numbers from earlier on in the thread)
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