I recently added a "board" to a PCB to create a cutout hole so that the mechanical guys could see the hole in Solid Works for fitting up my PCB to their requirements. I forgot to add a mechanical gerber layer when I ordered the PCB from China. I received a request for a GKO layer file so I sent them a new added mechanical layer showing the cutout. It's a small board having only one special push-pin mounting hole. My question is this: In the future, I can either use a pad with the hole size and pad width set to the same value to create a "drill hole", or I can create a "board cutout" by adding a round cutout area to the board and include a mechanical layer showing the details. The advantage of the board cutout is that I can see the hole in the 3d rendered image and my client can see the hole in the IDB file when they bring it up in Solid Works, but while the drilled hole (pad with no copper) is simpler, it cannot be seen in the 3d image. I'm interested in hearing what you guys out there do for a case like this and any opinions on the two options?