I just had 4000 grafts for my Class 3 pattern, is this a good number?

4000 grafts are likely 60% or more of your donor supply. Have you considered what you would do if your hair loss pattern evolved into a more advanced balding pattern? If you are under 26, this is a significant question; however, if you are over 35, the risk of developing a more advanced pattern may not be substantial unless some male in your family line developed a later pattern of advanced balding. Who do you take after in your family line?  Do you have a worst-case plan?  I think 4000 grafts for a balding Class 3 pattern male is mal-practice.