@Steve *******
1-year Smart-S visa type, stamp has multiple-entry built into visa itself with no re-entry permit needed. Each new "Smart-S" entry-stamp when I enter is dated exactly to the visa's expiration date in March.
Do you think it would be okay to leave on the old visa and passport, apply at an overseas consulate, and then return on the newly issued DTV visa within my new passport? Or is it more complicated, and I need to transfer over the old visa and cancel it before leaving? Not sure the "best" way to approach it!