Runs at FAST idle, not slow

Ok - got home early today and my son helped me with the "trick" KitC gave us on trying to clear the slow idle circuit in the carb. Net, it didn't work, we even tried while pumping carb cleaner in the idle screw mix inlet. It just doesn't seem to be getting enuf gas at slow idle to run, just runs rough then stalls out. Didn't have enuf time to check the valve lash yet.
I have a gas station down the street and as much as I hate to ask the guy there to work on it - I'm running out of options....
Any other ideas?