Also, to get a good idea of what is what you need to do these a rides using the same tire at various tire pressures. 10 psi apart probably will do from min to max. As well, it'd be nice to know the surface you ride on.
I frequently ride a MUP that is paved with asphalt that uses a very fine aggregate. It's very smooth except for parts that have a tree root expanding under it or areas that crack from movement of the road bed. If you are riding an asphalt or chip seal road with large aggregate, that'll be nice to know as your results may not extrapolate directly to what I am experiencing.