@David *********
>Previously it was 14days left on the Entry stamp correct? At what point did this change. Just in CM?
Different immigration offices have different requirements. For CM, to get an in-country Non-O visa based on retirement, you need 21 days remaining on your existing stamp.
>Pretty much makes it impossible to enter VISA exempt into the Sandbox and get the retirement VISA anywhere else as they are only giving 30 days again
A person can get a 30 day extension of stay based on tourism anywhere in the country (where the TM30 is filed), and then get an in-country Non-O visa based on retirement where they live.
My advice would be, when you arrive to Phuket, go to the immigration office and request a 30 day extension of stay based on tourism. Then, after the sandbox, go to CM and get an in-country Non-O visa.