Good for you man, sounds like it’s idling great. I didn’t want to overload you with information but I myself “tune” my engines a little during break in, but only if absolutely needed. Also, those tiny turns your doing of the screws are perfect. 1/4 and 1/8 turns are for the birds, always do...
During break in, your engine is wearing in to itself, the piston and sleeve are become “one” and wearing in, and idle fluctuations because of this are completely normal. If the idle goes up or down a little, don’t stress. Engines during break in can be temperamental and all over the place. As...