Back when Eddie Yamakawa first posted about Rod Moment, I found the sexyloops website post about Swing Weight and MOI. Moment of Inertia, and lead a lot of people down a rabbit hole, because measuring Rod MOI is much more complicated than just measuring Rod Moment. which only requires knowing: the distance from the butt end of the rod to the balance point of the extended rod in cm , and the weight of the rod in kg.
But despite that over complication there is much other useful information in their archives about casting and line weight, etc.
Today it was interesting to discover their January 2017 post about Tenkara fishing. I guess mostly I agree (thought not fully) maybe you will to or maybe not.