Hi there Foxhat.....one can clearly sense you a KP lover.
And a Big Yes on one of your statements, a a certain or specific rod & matching KP each for its own purpose.
It is just like fitting that 1 shoe out of 100's that sits well, feels good & does not tire your feet.....a must have.
By saying a "reworked" KP do you mean sized down specifically for spinning, ie. Had the drum made smaller by Collin ?