HI   GARCfieldi like your idle set up with a tach a lothave to give that a try-when the engine is set up right there is no mistaking a clean screeming run up to top end  from an idle -with any boogy condition  -if you are bogging you are to richthe pinch the fuel line thing-is just to get you close to were you need to be -but getting it right on the bench is what you want to doyour flight is only as good as your engine runs  !!