How to change from O-A to O

[DrJack54]

20 minutes ago, Searat7 said:

Sending over 800,000b is not a problem but I worry that since I had O-A visas from 2006-2020 that they will insist on insurance when I go for first extension in Bangkok.

What you have had in the past is irrelevant.

You can obtain a non O with subsequent extension or look at other options.

Obtain your non O in Thailand and extension then no insurance required.

You mention a stay of 7 months.

There are other options.