Very good, I'll give it a try.

Now, I will admit I'm scratching my head a bit over exactly what is going on here:

Next run the engine somewhere between 2,500 and 3,000 rpm. Hold it there and
adjust the low needle so that the engine increases rpm until it falls off. Back the low
needle up until the engine again increases rpm, then falls off because it got too rich.
Adjust the low needle back to the point on max rpm. All of that with the engine at
that initial throttle position required to obtain the 2,500 to 3,000. You do not want to
be using the throttle when adjusting the low needle.

Are you just adjusting the low needle back and forth between lean and rich to find the peak rpm, once the throttle is set (and not touched again) with the rpm in the 2500-3000 range?