Can I change my O-A visa to an O visa without canceling my current extension first?

The original poster wants to know if they need to cancel their current O-A visa extension before switching to a Non-O visa. Comments suggest that it is not necessary to wait for the current extension to expire; they can leave Thailand, get a 60-day visa exemption stamp across the border, and then apply for the Non-O visa in-country. It has been confirmed that exiting without a re-entry permit will effectively end the current extension. Additionally, one commenter noted a requirement for a significant financial statement (800k) for the new visa application.