At the very least, do the TM30 on your final entry of the ME Non-O visa. So far it’s only the Tourist Visas or Visa Exemptions which don’t get asked for TM30 for extensions.
Bruce W Bean The Re-Entry Permit that Ellie Takei mentioned allows you to leave and return, getting the same permitted to stay date as your original entry using the visa. Available in single and multiple types (
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Baht) depending how many time you want to exit and return within those 89 days.