@Ivan ********
my mistake booked 78 days instead of 75. I originally was going to do 45+30 paying the 1900bht so thought I would ask question about paying for 3 extra days when leaving. I looked at 60 day visa but have now decided as it was always planned to book tickets for trip to Vietnam before 45 entry stamp runs out and show them if asked my plane tickets to Vietnam. On reentry to Thailand will get another 45 days. Which more then covers me for my time in Thailand