I will arrive in Thailand next year from UK on an ‘O’ 90 day SE non immigrant visa from Hull .Near the expiry I would like to extend for about 2 weeks before returning to UK.How long extra can I get by (a) Extending at local Immigration(Lopburi) or (b) doing a border bounce or(c) flying to Singapore for 3 days and entering Thailand on Visa exempt.Many thanks for all your hard work