afb 1407 bog finally gone! get out the tiny drill bits. And a tuning question

How do you drill to a smaller size?
You gotta use a reversing drill bit like 66Valiant said ^^^

For anybody curious where I got the idea, right here: Hot Rods - Edelbrock afb leaking fuel in intake

I don't know if it's taboo to post other websites but I guess I'll find out