Holley/Demon Carb stumble

Every ono keeps saying change idle air bleed and i keep thinking why??? I need the mains to come on sooner........Got to quit thinking that way. The HSAB is for fuel trim not start of signal:BangHead:
Richer transfer slot is what i'm after and then trim it with the idle mixture screw....I think that's right????

Think i'm going to start with the power valve first.......Besides, i promised a video over the carb and 3 gear rolling stomp.