R1 Visa Location changed, Do I need to go for STAMPING in India

[sharmakitchen]

Hi Attorney,

I am on R1 and I moved my place (working location address) and got new approval until March 2019.  Now I am planning to visit family in India.

Please let me know if I need to go for stamping in India.  Somebody recommended to go to Canada and get stamping (as it is easy) and later travel to India.

      * Please tell me it is ok to go to Canada and get stamping and come to USA and later travel to India

      * OR, Travel to India directly and go for stamping

     * I came on R1 and got extension approved, I heard; DROP BOX only required and not stamping. 

Which is the easy and right thing to do.  Your suggestion will help.