I have a #1 carb body for an '81 CB750C Custom with the very tip of the pilot screw broken off and wedged into the carb body, came that way. I have tried using various things as a punch and lever to push this out. Everything that small bends or breaks. I saw someone using Nitric Acid on You Tube to dissolve the brass with only a few drops of Nitric Acid. Any ideas where I could purchase $10-$20 worth of Nitric Acid (just a few drops) to try this out for myself?