If the spool had more mass around its circumference, spooling with lighter line would technically help with a faster start up but as you mentioned above, the differences would be negligible.
Now dont quote me on this, but my thinking is that a fixed axis, which is obviously the line through the center of mass. Your rotation is perpendicular to the pull (I guess, verticle with horizontal movement?). Im thinking is the centripetal force is affected by gravity, thinking of a see-saw. the further away the weight is from the fulcrum/axis the more generative "force" it has or the less the moment of inertia is? I dont know man in my head it made sense ahah
