Hi all. I have decided to replace the sink in my 5th wheel RV. I cannot find a new sink of the same dimensions, so I will have to modify the counter and cabinet as well as the waste plumbing. I want to go to a single drain instead of this double sink. The biggest issue I am facing is that this sink is very shallow, so I will need to drop the plumbing down a few inches. The best way to do this from what I can see would be to eliminate the drop elbow at the wall corner by cutting the straight pipe then installing a coupler and new elbow without that drop. The first image is the drop that I am talking about. The 2nd image is of the current under sink config. The third image is the waste pipe that I am lowering where it comes into the sink area under the cabinet. Thank you.