Here we go...With throtlle all the way closed and trim all the way down as well..the carb opening should be closed completely...if not adjusted it mechanically... you want to have a a small cresent opening in the carb (about a 1/16 to a 1/8 in or so) with throttle trim set at 1/2 way..this will give you your idle...if it idles to slow or fast adjust the trim....now with the throttle all the way up, the carb opening should be full open....if not again adjust mechanically...yea you can get the balance between closed and open...you just gotta work on it
Good Luck and Good Flyin