@Stephan **********
Thanks for that. As you mentioned, each IO is different. One important aspect regarding the Jomtien IO is those birds require the 800K to be seasoned for the 60 days when you make the initial application for a change to a Non-O.....,...not when you apply for the one- year extension. You would not believe the physical & financial grief that particular point has cost me. I would had simply moved to Phuket to circumvent their cock-eyed rule, but I had just had double total knee replacement and was/am having a troubled extended recovery and serious immobility.
Out of that my doctor requested a total of 180 days medical extension (2 X 90). All Jomtien gave me out of those 2 request was 30 days. Take my lesson to heart and do not dare to get medical work done within their district that would require a medical extension and involve immobility. Rant over.