Yep a notarised copy of my passport issued by the embassy worked for me too and is actually written in the rule book at Bangkok Bank as the staff showed me it.
But of course on the internet they all believe walking to 1000 branches will serve them better lol
Pretty much what has been reported here although it did state that you must leave at the end of this extension.
Of course until it is extended again or not as may be.
My personal view is they will be looking hard at those who have been on extension after extension to weed out those working here illegally.....besides that everyone should be fine.