I recently added a counter top extension to our Georgetown 2015.
Due to space restrictions, and a stroke that the DW had, I could not use anything that required too much effort to work. I originally wanted to have one that would fit into brackets at the end of the sink area.
I used these brackets.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1And this cutting board.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
I used a shim under the countertop the height of the cutting board.
I also used some 1/2 in sheet metal screws to attach the cutting board to the bracket, these were left over from a deck project.
I did removed the handle from the door.