Hello, I have read very similar posts however none that seem to match exactly what I have going on. I am in the process of getting my house ready to sell and I will need to be able to pass inspection. Is there a way I can tie the existing drain that goes into the wall and horizontal to the right as a vent while creating a new drain line that goes down into the bottom of the cabinet? Or should I just remove the disposal since without it the drain should be fine? I just thought the disposal would be a nice selling feature. It's a single basin sink also if that matters.