I was not referring to the model in your "experiment". I was referring to your mathematical model.
So one minute you are complaining about friction in the physical model after saying you checked the mathematical one but then you want to play switch up and object to the mathematical version.
How is anyone supposed to keep up with the word games you are playing and understand what you are really talking about?
I notice you haven't said anything about the TWO MASSES I dropped to show that friction against the dowel was negligible in the physical model.
You haven't said anything about the TOTAL WEIGHT of a floor assembly or the BEAMS in the CORE either.