It went ok, they don't speak even a hi our movement of the head or anything, they just wave with their hands to tell you to come or to f off, both side of the border.
I wonder if the more you smile the more they know how much you are ready to beg them to see your family again.
Anyway, Cambodian IO wanted 1500 bahts, didn't care about the 30$, I managed to make him understand that I was ready to pay the corruption fine but to accept the 30$, once I put 400 bahts next to it he was ok. Next was the arrival boot, another one, he showed me a card without explaining anything, I told him ok please give it to me I will fill it immediately, he waved his hand to say no, he managed to say 2 and I managed to understand he meant 200 bahts, I insisted to fill the card myself but as he became aggressive I gave the 200. They would not speak on the Thai side either, busy eating or playing games on their mobiles, as I asked for the TM 6 and got no answers, I asked if they could speak Thai (in Thai), they got a little surprised but went back ignoring me.
In total I paid 1700 bahts instead of the 2500 bahts asked by the agent that you are forced to deal with when you give your passport to the departure Thai IO.
Took only 30 minutes, they treat everyone like they or POS so nothing personal.