@Rick ******
you must leave the bt800,000 in your account for at least three months after you get your early stamp, then for the rest of the year the balance must stay above bt400,000. This does not change because you are switching to the monthly deposits method. After you get your year stamp based on 12 monthly bt65,000+ deposits, at that point you can remove the last bt400,000. If you take the money out before those times then you are in violation and extension was cancelled meaning you start over completely, and at an extreme they could charge you with overstay.