Some clinics do the hairline drawing a day before the actual OP day .
That gives the patient enough time to think about the hairline over night .
Although i can see that clinic gave you enough time to think about the hairline , but it's always better for patient to think about the hairline he want before the OP day , so you can discuss all ideas you have with surgeon .
before deciding the hairline , when you raise your eyebrows as much as you can , you will know where muscles end so hairline can be placed with a safe distance above that .
To be honest , your hair line looks to be in a perfect position with nice symmetry "regardless of what your original hairline looked like" and you are having awesome grow rate at 4th month .
I do get that some details may not be clearly visible in the pictures , however for people looking at you in real life they won't be noticing these details as well .