What Documents Do I Need for a 60-Day Visit Extension in Thailand?

Hello,

i want to get 60 days visit wife extension (came here on 30 days exemption and already get 30 days standart extension). TM30 registered by landlord in Bangkok, Bangna. That is the address where we stay. My wifes address in tambien baan is in Surin. So i should go to get 60 days extension at Chang Wattana? Thats the place right?

I will take my wife with me and also: TM7, my passport and copy, her id copy, her tambien baan copy, marridge certificates copy and originals, lease aggreement copy; i can also take copy of my affirmation of freedom to marry, wife name change form and copy of landlorm ID. I forget something else? A lot of papers and i dont want to go there two times. I want to be prepared.

Thank you