Unfortunately I did touch the mid needle.

What I did was as soon as I opened the box I counted each turn in to see what the factory settings were, I lost the numbers.
The mid needle is flush and the other settings are set, if I notice that the engine is too lean or rich as break in I will adjust from there.
The high speed and idle needles are easy to set, but how does the low speed needle need to be set? What do I listen or look for?