Can I apply for a marriage-based visa extension in Thailand before the last 30 days of my initial stay?

Done this 3 times. The 30 day consideration is part of your yearly extension. When you return after 30 days, the date stamped is one year forward of your application date not return date.

@Tod ********

I don't meant to high jack the question but it is kind of a follow up to this one. I intend to ask when I apply for my extension on Chiang Mai, but perhaps you know so I can start planning a little earlier.

My understanding is I will get a 30 day under consideration stamp when applying for the 1 year extension based on marriage. My question is, if I apply say 30 days before my original non-o expires, will that 30 day under consideration be from the day I apply or be added onto the non-o expiration date? If from the day I apply, will that result in me essentially losing 30 days that I could've had by applying later? Or will the 1 year still be added to the non-o expiration date?

I'd like to go back to the US at the end of June, but my current stamp ends on June 19th. I really don't want to be in this yearly cycle where I have to be here in June and July in order to get the yearly extension.