idle adjust screw at end of turning

[psyfi_1]

hi guys i recently did my carb balance and noticed after it got warm idle was a little off so i turn idle screw it to keep it at 1100rpm on thing is the idle screw wont turn any further will i have to turn back the screw and rebalance to its origanl setting the carb is balanced properly but it was only ticking over on 1000 -1100 rpm should i set the idle screw back to factory turns and retry balance??