Help! Idle speed screw not working :(

Don at FBO used top give out free Holley/Demon carb advice. read lots of his posts. he had 2 gripes: Always get your floats set correctly FIRST. your fuel level determines the 'pressure' the idle feeds are getting in addition to the vacuum that is pulling idle curcuit fuel. second was adjust the stops so that the idle slots are perfect squares, ie; they are exposed just as much as they are wide. Adjust accordingly and then start doin gthe rest of the adjustments. 90% of new carbs run fine out of the box. If you have a pipe cleaner, make sure your air bleeds are not plugged, all 4 on top should be clear.