Edelbrock models 1405 versus 1406 carburetors

.... What ended up totally ridding the bog was I pulled the secondary clusters removed the early feed tubes in the secondarys ( the small tubes) peened the main air bleeds smaller to about 1/2 the stock size to give stronger signal to the boosters. ....

I have exatly the same secondary bog and an AEM wideband that shows total lean out when flooring.
I'm understand all in this tread exept "peened the main air bleeds smaller to about 1/2 the stock size", how did you do that?