ORIGINAL: safeTwire
W8Ye's correct, and this too is part of the learning process!
If this happens, back the LS needle out until it's flush with the carbureator body's surface. This yields a "ballpark" LS needle setting that will allow the engine once again to start and run.
Point I am trying to make here is that I think its better to screw up adjustments so bad that the engine wont run at all...THAN... have a flameout on takeoff. (Those really stink no matter how good of a pilot you are)
Experiment with (slight) adjustments, test then re adjust. Its half the fun IMO, and , your airplane and wallet with be very thankful!
I understand the point of making drastic changes to observe the reactions, however the low speed needle is sensitive to 1/32 of a turn, and turning in and out isn't the best for the rings.
Leave the low speed alone for now; run a tank through as per the manual (two and four stroke bla bla bla), then adjust the high speed lean enough that you feel the engine is reliable - won't quit on acceleration, and fly fly fly.
OS engines break in flying - one tank on the ground, adjust to reliable transition, and fly away! After a couple of days, see how you like the transition. Mine needed ONE slight turn to the right for PERFECT transition (which I did after a few weeks of flying actually) and I haven't needed to touch it since. Now has 14ish gallons of fuel through it.