RE: Engine runs different during K.E. flight
Travis,
If you have the line running from the cover plate into the fuselage, then the carb plate will not do much, if any good, it is basically doing the exact same thing which is to stop direct airflow over the hole in the plate. Now that we have a bit more info on the needle and stack locations, I would try leaning it a bit, then if that does not settle it down, remove the stack.