DA sets the high to 2 turns and low to 1 3/4 at the factory. But those are very rich settings for the masses. IMO it keeps engines from getting torched during break in. You could lean the low end for a good transition and leave the high end at 2 turns and see how it runs. The low needle controls 75% of your throttle position. The high needle is the rest. So the low end is very important. Don't worry about gurgling for now, just get the transition to be fast (after a 10 second idle).

Also I think I'd get the engine to re-start after it's been running before ever taking off again. Mine re-starts with a very light flip every time and that's what they should all do.