What is weight of stock 340 piston

BTW, Pishta, I just bought and tried one of the exact Horrible Freight scales that you show, and with the same rod, it measured the exact same total weight and I got the exact same big end weight.... to the gram... vs. my $50 Ohuas scale. (That agreement could be good and that could be bad LOL)

IMHO, the setup pictured above is going to give the same or worse problems with these cheapo-scales.....any tilt action or side force is gonna throw it off, and it seems like a tall hanging point is gonna have more leverage to put tilt force on the scale. I am gonna guess that these cheapo scales use just 1 electronic load sensor.... it looks like precision scales have 4 of them, one at each corner of the plate.

Maybe anyone with a good, consistent setup and scale for this work can speak up; I can't see any info on the CWT scale, but I suspect it is bought elsewhere and re-labeled.