What is weight of stock 340 piston

Here us my hanging basket of frustration. $10 in parts including the $6 chain. Everything is good now except the big end mandrel. I was trying for a snug fit to minimize the lateral tolerance but i think that is less important with the trapeze than the flatness that it sits. I believe that is why your flat plate setup ( pics?) is giving you more consistent readings . If i had a machined perpendicular mandrel that would hold the big end exactly the same way every time it would be better. Along with a 4 corner pickup scale.
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