It looks like this

Here is my problem. It had a BIG YELLOW WARNING STICKER on it that said basically ... "Do not remove the Brass Fuel Line Fitting, it is the needle valve seat and if it is removed the thing will flood and or run like crud. etc.. " (OK, I am summarizing) ...
Well, as you have probably already guessed... I removed that stupid thing without thinking.. took it down to the auto parts store and found an adapter for my fuel lines...(seemed like a smart thing to do at the time) I slapped the whole thing back together and ... FLOOD.. gas is flowing out the top like old faithful. Only after that happened did I find and finally really pay attention to the BIG YELLOW WARNING STICKER.... brilliant..
So, my question is... If I open this thing up, is it pretty straight forward how to reseat the needle or whatever needs to be done? Or am I better off taking it to a rebuilder? I don't (usually )consider myself an idiot, but I am very much a newbie when it comes to carburetors.
Any advice is appreciated!
Thanks!