What is the minimum number of days left on a visa stamp to apply for a one-year extension based on marriage to a Thai citizen?

For the one-year extension based on married to Thai citizen - is there a minimum number of days left on stamp required?

I've read all the posts referring to 30/45 days or less to be able to apply. Do I need at least 20, 15, 10 days left? Or could I apply when there is 1-2 days left on my current entry stamp?

I'm currently on a non-o married to spouse visa, so this will be my first in country 1 year extension. Looks like my B400,000 will only complete the 2 months seasoning when I have around 5 days left on my current entry stamp.