Charles, you dont strive for a TIGHT fit,, you strive for a consistant fit,, then you use the tape to seal the gap... a tight gap without tape is actually worse because a .005 variation in a .02 gap is far more significant than a .005 variation in a .0625,, so instead of trying to achieve that perfect spacing,, ( because it will vary with air loads and the flexibility of control surfaces,, ) you use tape carefully applied over the hingline to seal the airflow,,
again, some time using the search feature perhaps searching ( sealed hingelines) will uncover far more extensive discussion than I am prepared to retype here,, as will searching for ( removable control surfaces)