Below is what I gathered from Puspakom website on their operation hours.
Operating Hours
Monday to Friday :8am - 6pm
Every Saturday :
7am - 1pm
Off Day :
Sunday
I off as early as 10 minutes before 7 am since it was stated that they start from 7 am. When I reached there, I have to asked a taxi driver where to do B5 inspection, unfortunately he didn't know about it. So, I went straight to the main gate, nobody was there and I asked one fine guy and he showed me where to line up. By the look of it, I'm the first one in line.
To be continued....I have some urgent matters to deal with.