American passport. I am currently on an ED visa in bangkok, which ends December 24th. I have a flight back home on December 26th. My plan is to go to immigration on the 22nd, cancel my visa or whatever the end process is called for an ED visa, and also apply for an extention. I am hoping the result is a 7 day stamp to get out of thailand when the extention gets denied. Is this a sound plan? Thanks in advance for any information.