you will not get spectacular coverage,your bald spot is pretty big,like mine,you should get decent coverage,you will probably need a second ht for more density,and i doubt they put in 40 cm2,it looks more like 25cm2,and i'm not sure of 4500 grafts in 8 hours,that sounds impossible,they did3976 grafts on me in 2 sessions(days)at 6 to 7 hours each.