Edelbrock Needle Help

[raptor350joe]

I recently bought a Edelbrock Quicksilver 2 carb and it didn't come with any extra needles. It currently has a 9-K needle in it. I was wondering what needles others have in theirs and which extra needles should I get just incase I need to change to another one. Anyone know the difference between K needles and E needles and the 0 needles?

I haven't tried installing the carb yet since I am breaking in the new engine, but soon ill be installing it and I want to get extra needles just incase.

Thanks in advance!