Cutting a hole in your house is a bit troubling. Here I’ve squared my opening. A hint of the house’s original green stain is visible on a shingle on the bottom right of the cutout.
Installation of a waterline for an ice maker was prompted by the purchase of a new fridge, which in turn entailed replacing the stove and over-the-range (OTR) microwave to ensure matching finishes (fortunately the dishwasher was an integrated model and concealed behind cabinetry).