Be careful to move only the regulating arm on tbe balance assembly. Moving the stud arm will change the beat of the watch, and without a timegrapher it cannot be accurately adjusted or corrected if you move it. Also, be careful to not impose a downward force on the regulator arm or any part of the balance assembly. Use a small screwdriver (or a toothpick sanded blunt on one end and wiped off with alcohol) and hold it parallel to the floor while adjusting. Make adjustments in as small an increment as you can manage, then test for results. Without a timegrapher, note when the seconds hand sweeps through a marker (i.e. 12 o'clock) and start a digital stopwatch on your phone. Wait for the second hand to complete a full minute, stop the stopwatch and compare. Readjust accordingly. After the two become very close, let the seconds hands hand run longer, 2, 3 minutes, etc. Finally let it run 15 minutes or so and compare. You can make final tiny adjustments with the micro adjustment screw. Clockwise movement of the regulator arm will gain time.
Adjust it face up first, when happy test it face down. If it differs you can re-regulate to split the difference. If you have a huge difference between the two, you have more issues than regulation.