Take the carb totally apart. (Float bowl,float, both jets, the little plastic thingy that sits around the main jet) That way there's less of a chance of metal shavings getting in places you dont want them(and less to clean afterwards).
I used a can of carb cleaner, and then blew it out using my air compresser.
I used a dremel with the heavy duty cutting disk(not those small flimsy ones) to flatten the angle on the outside of the carb. I used a small screw driver and some sandpaper to deburr the inside.
I guess i got lucky, cause i didnt grind all that much off of the outside. The screw is pretty much all the way in, but it idles fine.
Dont forget to use soem kind of oil to lube the tap(i used WD-40), and take your time...